teng_ml/main.py

@@ -18,9 +18,8 @@ import time
 from os import makedirs, path
 
 from .util.transform import ConstantInterval, Normalize
-from .util.data_loader import load_datasets, LabelConverter, count_data
+from .util.data_loader import load_datasets, LabelConverter
 from .util.split import DataSplitter
-from .util.pad import PadSequences
 from .util.settings import MLSettings
 from .rnn.rnn import RNN
 from .rnn.training import train_validate_save, select_device
@@ -42,30 +41,34 @@ def test_interpol():
 
 
 if __name__ == "__main__":
-    # labels = LabelConverter(["foam_PDMS_white", "foam_PDMS_black", "foam_PDMS_TX100", "foam_PE", "antistatic_foil", "cardboard", "glass", "kapton", "bubble_wrap_PE", "fabric_PP", ])
-    labels = LabelConverter(["foam_PDMS_white", "foam_PDMS_black", "foam_PDMS_TX100", "foam_PE", "kapton", "bubble_wrap_PE", "fabric_PP", ])
-    models_dir = "/home/matth/Uni/TENG/teng_2/models_gen_8"  # where to save models, settings and results
+    labels = LabelConverter(["white_foam", "black_foam", "rigid_foam", "cardboard", "glass", "Kapton", "bubble_wrap", "cloth_ffp2", ])
+    models_dir = "/home/matth/Uni/TENG/teng_2/models_gen_1"  # where to save models, settings and results
     if not path.isdir(models_dir):
         makedirs(models_dir)
     data_dir = "/home/matth/Uni/TENG/teng_2/sorted_data"
 
-    # gen_5 best options: datasplitter, not bidirectional, lr=0.001, no scheduler
-    # gen_6 best options: no glass, cardboard and antistatic_foil, not bidirectional, lr=0.0007, no datasplitter, 2 layers n_hidden = 10
 
     # Test with
-    num_layers = [ 2 ]
-    hidden_size = [ 7, 11, 14 ]
-    bidirectional = [ False, True ]
-    t_const_int = ConstantInterval(0.01)  # TODO check if needed: data was taken at equal rate, but it isnt perfect -> maybe just ignore?
+    num_layers = [ 3 ]
+    hidden_size = [ 8 ]
+    bidirectional = [ True ]
+    # t_const_int = ConstantInterval(0.01)  TODO check if needed: data was taken at equal rate, but it isnt perfect -> maybe just ignore?
     t_norm = Normalize(-1, 1)
-    transforms = [[ ], [ t_norm ]]  #, [ t_norm, t_const_int ]]
-    batch_sizes = [ 4 ]
-    splitters = [ DataSplitter(50, drop_if_smaller_than=30), DataSplitter(100, drop_if_smaller_than=30) ]  # smallest file has length 68 TODO: try with 0.5-1second snippets
-    num_epochs = [ 5 ]
-    # (epoch, min_accuracy)
-    training_cancel_points = [(10, 10), (20, 20), (40, 30)]
-    # training_cancel_points = []
+    transforms = [[ t_const_int, t_norm ]]
+    batch_sizes = [ 64 ]  # , 16]
+    splitters = [ DataSplitter(100) ]  # TODO: try with 0.5-1second snippets
+    num_epochs = [ 60 ]
 
+     # num_layers=1,
+     # hidden_size=1,
+     # bidirectional=True,
+     # optimizer=None,
+     # scheduler=None,
+     # loss_func=None,
+     # transforms=[],
+     # splitter=None,
+     # num_epochs=10,
+     # batch_size=5,
     args = [num_layers, hidden_size, bidirectional, [None], [None], [None], transforms, splitters, num_epochs, batch_sizes]
 
     # create settings for every possible combination
@@ -75,28 +78,23 @@ if __name__ == "__main__":
 
     loss_func = nn.CrossEntropyLoss()
     optimizers = [
-        lambda model: torch.optim.Adam(model.parameters(), lr=0.0005),
-        lambda model: torch.optim.Adam(model.parameters(), lr=0.0007),
-        # lambda model: torch.optim.Adam(model.parameters(), lr=0.008),
+        lambda model: torch.optim.Adam(model.parameters(), lr=0.03),
+        # lambda model: torch.optim.Adam(model.parameters(), lr=0.25),
+        # lambda model: torch.optim.Adam(model.parameters(), lr=0.50),
     ]
     schedulers = [
-        None,
         # lambda optimizer, st: torch.optim.lr_scheduler.ExponentialLR(optimizer, gamma=0.9),
-        # lambda optimizer, st: torch.optim.lr_scheduler.ExponentialLR(optimizer, gamma=0.5),
-        lambda optimizer, st: torch.optim.lr_scheduler.StepLR(optimizer, step_size=st.num_epochs // 8, gamma=0.50, verbose=False),
+        lambda optimizer, st: torch.optim.lr_scheduler.StepLR(optimizer, step_size=st.num_epochs // 10, gamma=0.40, verbose=False),
         # lambda optimizer, st: torch.optim.lr_scheduler.StepLR(optimizer, step_size=st.num_epochs // 10, gamma=0.75, verbose=False),
     ]
 
-    device = select_device(force_device="cpu")  # TODO cuda is not supported because something throws NotImplementedError with my gpu
     n_total = len(settings) * len(optimizers) * len(schedulers)
-    print(f"Testing {n_total} possible configurations, device='{device}'")
+    print(f"Testing {n_total} possible configurations")
     # scheduler2 = 
     def create_model(st, optimizer_f, scheduler_f):
         model=RNN(input_size=st.num_features, hidden_size=st.hidden_size, num_layers=st.num_layers, num_classes=len(labels), bidirectional=st.bidirectional)
         optimizer = optimizer_f(model)
-        if scheduler_f is not None:
         scheduler = scheduler_f(optimizer, st)
-        else: scheduler = None
         return model, optimizer, scheduler
 
     t_begin = time.time()
@@ -105,21 +103,19 @@ if __name__ == "__main__":
         for s in range(len(schedulers)):
             for i in range(len(settings)):
                 st = settings[i]
-                train_set, test_set = load_datasets(data_dir, labels, exclude_n_object=None, voltage=None, transforms=st.transforms, split_function=st.splitter, train_to_test_ratio=0.7, random_state=80, num_workers=4)
+                # print(st.get_name())
+                train_set, test_set = load_datasets(data_dir, labels, voltage=8.2, transforms=st.transforms, split_function=st.splitter, train_to_test_ratio=0.7, random_state=42, num_workers=4)
 
                 generator = torch.manual_seed(42)
-                train_loader = DataLoader(train_set, batch_size=st.batch_size, shuffle=True, generator=generator, collate_fn=PadSequences())
-                test_loader = DataLoader(test_set, batch_size=None, shuffle=True, generator=generator)
-
-                # set batch_size to None and remove collate_fn for this to work
-                # count_data(train_loader, st.labels, print_summary="training data")
-                # count_data(test_loader, st.labels, print_summary="validation data")
-
-
-                model, optimizer, scheduler = create_model(st, optimizers[o], schedulers[s])
+                # train_loader = iter(DataLoader(train_set))
+                # test_loader = iter(DataLoader(test_set))
+                train_loader = DataLoader(train_set, batch_size=st.batch_size, shuffle=True, generator=generator)
+                test_loader = DataLoader(test_set, batch_size=st.batch_size, shuffle=True, generator=generator)
                 print(f"Testing {n}/{n_total}: (o={o}, s={s}, i={i})")
+                model, optimizer, scheduler = create_model(st, optimizers[o], schedulers[s])
+                device = select_device(force_device="cpu")
                 try:
-                    train_validate_save(model, optimizer, scheduler, loss_func, train_loader, test_loader, st, models_dir, print_interval=1, print_continuous=True, training_cancel_points=training_cancel_points)
+                    train_validate_save(model, optimizer, scheduler, loss_func, train_loader, test_loader, st, models_dir, print_interval=1)
                 except KeyboardInterrupt:
                     if input("Cancelled current training. Quit? (q/*): ") == "q":
                         t_end = time.time()

teng_ml/rnn/rnn.py

@@ -19,59 +19,52 @@ class RNN(nn.Module):
         self.softmax = nn.Softmax(dim=1)
         self.D = 2 if self.is_bidirectional == True else 1
 
-    def forward(self, x, unpadded_lengths=None):
-        """
-        @param x:
-            Tensor (seq_length, features) for unbatched inputs
-            Tensor (batch_size, seq_length, features) for batch inputs
-            PackedSequence for padded batched inputs
-        @param unpadded_lengths: Tensor(batch_size) with lengths of the unpadded sequences, when using padding but without PackedSequence
-        @returns (batch_size, num_classes)  with batch_size == 1 for unbatched inputs
-        """
-        # if type(x) == torch.Tensor:
-        #     device = x.device
-        #     # h0: initial hidden states
-        #     # c0: initial cell states
-        #     if len(x.shape) == 2:  # x: (seq_length, features)
-        #         h0 = torch.zeros(self.D * self.num_layers, self.hidden_size).to(device)
-        #         c0 = torch.zeros(self.D * self.num_layers, self.hidden_size).to(device)
-        #     elif len(x.shape) == 3:   # x: (batch, seq_length, features)
-        #         batch_size = x.shape[0]
-        #         h0 = torch.zeros(self.D * self.num_layers, batch_size, self.hidden_size).to(device)
-        #         c0 = torch.zeros(self.D * self.num_layers, batch_size, self.hidden_size).to(device)
-        #     else:
-        #         raise ValueError(f"RNN.forward: invalid input shape: {x.shape}. Must be (batch, seq_length, features) or (seq_length, features)")
-        # elif type(x) == nn.utils.rnn.PackedSequence:
-        #     device = x.data.device
-        #     h0 = torch.zeros(self.D * self.num_layers, self.hidden_size).to(device)
-        #     c0 = torch.zeros(self.D * self.num_layers, self.hidden_size).to(device)
-        # else:
-        #     raise ValueError(f"RNN.forward: invalid input type: {type(x)}. Must be Tensor or PackedSequence")
+    def forward(self, x):
+        device = x.device
 
+        # h0: initial hidden states
+        # c0: initial cell states
+        if len(x.shape) == 2:  # x: (seq_length, features)
+            h0 = torch.zeros(self.D * self.num_layers, self.hidden_size).to(device)
+            c0 = torch.zeros(self.D * self.num_layers, self.hidden_size).to(device)
+        elif len(x.shape) == 3:   # x: (batch, seq_length, features)
+            batch_size = x.shape[0]
+            h0 = torch.zeros(self.D * self.num_layers, batch_size, self.hidden_size).to(device)
+            c0 = torch.zeros(self.D * self.num_layers, batch_size, self.hidden_size).to(device)
+        else:
+            raise ValueError(f"RNN.forward: invalid iput shape: {x.shape}. Must be (batch, seq_length, features) or (seq_length, features)")
 
         # lstm: (batch_size, seq_length, features) -> (batch_size, hidden_size)
-        # or:   packed_sequence -> packed_sequence
-        # out, (h_n, c_n) = self.lstm(x, (h0, c0))
-        out, (h_n, c_n) = self.lstm(x)  # (h0, c0) defaults to zeros
+        out, (h_n, c_n) = self.lstm(x, (h0, c0))
+        print(f"forward: out.shape={out.shape} TODO verify comment")
+        # out: (N, L, D * hidden_size)
+        # h_n: (D * num_layers, hidden_size)
+        # c_n: (D * num_layers, hidden_size)
+        # print(f"out({out.shape})={out}")
+        # print(f"h_n({h_n.shape})={h_n}")
+        # print(f"c_n({c_n.shape})={c_n}")
+        # print(f"out({out.shape})=...")
+        # print(f"h_n({h_n.shape})=...")
+        # print(f"c_n({c_n.shape})=...")
 
-        # select the last state of lstm's neurons
-        if type(out) == nn.utils.rnn.PackedSequence:
-            # padding has to be considered
-            out, lengths = nn.utils.rnn.pad_packed_sequence(out, batch_first=True)
-            # the unpadded length of batch i is lengths[i], so that is the last non-zero state
-            out = torch.stack([out[i,lengths[i].item()-1,:] for i in range(len(lengths))])
-        elif unpadded_lengths is not None:
-            out = torch.stack([out[i,unpadded_lengths[i].item()-1,:] for i in range(len(unpadded_lengths))])
+        """
+        # select only last layer [-1] -> last layer,
+        last_layer_state  = h_n.view(self.num_layers, D, batch_size, self.hidden_size)[-1]
+        if D == 1:
+            # [1, batch_size, hidden_size] -> [batch_size, hidden_size]
+            X = last_layer_state.squeeze()           # TODO what if batch_size == 1
+        elif D == 2:
+            h_1, h_2 = last_layer_state[0], last_layer_state[1]   # states of both directions
+            # concatenate both states, X-size: (Batch, hidden_size * 2）
+            X = torch.cat((h_1, h_2), dim=1)
         else:
-            if out.shape[0] == 3:  # batched
-                out = out[:,-1,:]
-            else:  # unbatched
-                # softmax requires (batch_size, *)
-                out = torch.stack([out[-1,:]])
+            raise ValueError("D must be 1 or 2")
+        """  # all this is quivalent to line below
+        out = out[:,-1,:]  # select last time step
 
         # fc fully connected layer: (*, hidden_size) -> (*, num_classes)
         out = self.fc(out)
 
-        # softmax: (batch_size, *) -> (batch_size, *)
+        # softmax: (*) -> (*)
         out = self.softmax(out)
         return out

teng_ml/rnn/training.py

@@ -7,7 +7,7 @@ from torch.utils.data import DataLoader
 from ..util.settings import MLSettings
 from ..tracker.epoch_tracker import EpochTracker
 from ..util.file_io import get_next_digits
-from ..util.string import class_str, optimizer_str
+from ..util.string import class_str
 
 from ..util import model_io as mio
 
@@ -30,20 +30,29 @@ def select_device(force_device=None):
     return device
 
 
-def train(model, optimizer, scheduler, loss_func, train_loader: DataLoader, st: MLSettings, print_interval=1, print_continuous=False, training_cancel_points=[]) -> EpochTracker:
+def train(model, optimizer, scheduler, loss_func, train_loader: DataLoader, st: MLSettings, print_interval=1) -> EpochTracker:
     epoch_tracker = EpochTracker(st.labels)
     epoch_tracker.begin()
     for ep in range(st.num_epochs):
         loss = -1
-        for i, (data, lengths, y) in enumerate(train_loader):
+        for i, (data, y) in enumerate(train_loader):
+            # print(data, y)
             # data = batch, seq, features
+            # print(f"data({data.shape})={data}")
             x = data[:,:,[2]].float()   # select voltage data
             # print(f"x({x.shape}, {x.dtype})=...")
             # print(f"y({y.shape}, {y.dtype})=...")
-            # pack = torch.nn.utils.rnn.pack_padded_sequence(x, lengths, batch_first=True)
-            # out = model(pack)  # really slow
-            out = model(x, lengths)
+            # length = torch.tensor([x.shape[1] for _ in range(x.shape[0])], dtype=torch.int64)
+            # print(f"length({length.shape})={length}")
+            # batch_size = x.shape[0]
+            # print(f"batch_size={batch_size}")
+            # v = x.view(batch_size, -1, feature_count)
+            # data = rnn_utils.pack_padded_sequence(v.type(torch.FloatTensor), length, batch_first=True).to(device)[0]
+            # print(f"data({data.shape})={data}")
+            out = model(x)
 
+            # print(f"out({out.shape}={out})")
+            # print(f"  y({y.shape}={y})")
             with torch.no_grad():
                 predicted = torch.argmax(out, dim=1, keepdim=False)  # -> [ label_indices ]
                 correct = torch.argmax(y, dim=1, keepdim=False)  # -> [ label_indices ]
@@ -63,18 +72,8 @@ def train(model, optimizer, scheduler, loss_func, train_loader: DataLoader, st:
 
             # predicted = torch.max(torch.nn.functional.softmax(out), 1)[1]
         epoch_tracker.end_epoch(loss, optimizer.param_groups[0]["lr"])
-        if (ep+1) % print_interval == 0:
-            if print_continuous: end='\r'
-            else: end='\n'
-            print(f"Training:", epoch_tracker.get_epoch_summary_str(), end=end)
-        # cancel training if model is not good enough
-        if len(training_cancel_points) > 0 and ep+1 == training_cancel_points[0][0]:
-            if epoch_tracker.accuracies[-1] < training_cancel_points[0][1]:
-                print(f"Training cancelled because the models accuracy={epoch_tracker.accuracies[-1]:.2f} < {training_cancel_points[0][1]} after {ep+1} epochs.")
-                break;
-            training_cancel_points.pop(0)
-
-        if scheduler is not None:
+        if ep+1 % print_interval == 0:
+            print(f"Training:", epoch_tracker.get_epoch_summary_str())
         scheduler.step()
     print("Training:", epoch_tracker.end())
     return epoch_tracker
@@ -86,27 +85,24 @@ def validate(model, test_loader: DataLoader, st: MLSettings) -> EpochTracker:
     with torch.no_grad():
         for i, (data, y) in enumerate(test_loader):
             # print(ep, "Test")
-            x = data[:,[2]].float()
+            x = data[:,:,[2]].float()
             out = model(x)
 
             predicted = torch.argmax(out, dim=1, keepdim=False)  # -> [ label_indices ]
-            if y.shape[0] == 2:  # batched
             correct = torch.argmax(y, dim=1, keepdim=False)  # -> [ label_indices ]
-            else:  # unbatched
-                correct = torch.argmax(y, dim=0, keepdim=True)  # -> [ label_indices ]
 
             epoch_tracker.add_prediction(correct, predicted)
     print("Validation:", epoch_tracker.end())
     return epoch_tracker
 
 
-def train_validate_save(model, optimizer, scheduler, loss_func, train_loader: DataLoader, test_loader: DataLoader, st: MLSettings, models_dir, print_interval=1, print_continuous=False, show_plots=False, training_cancel_points=[]):
+def train_validate_save(model, optimizer, scheduler, loss_func, train_loader: DataLoader, test_loader: DataLoader, st: MLSettings, models_dir, print_interval=1, show_plots=False):
     # assumes model and data is already on correct device
     # train_loader.to(device)
     # test_loader.to(device)
 
     # store optimizer, scheduler and loss_func in settings
-    st.optimizer = optimizer_str(optimizer)
+    st.optimizer = class_str(optimizer)
     st.scheduler = class_str(scheduler)
     st.loss_func = class_str(loss_func)
 
@@ -115,15 +111,15 @@ def train_validate_save(model, optimizer, scheduler, loss_func, train_loader: Da
     def add_tab(s):
         return "\t" + str(s).replace("\n", "\n\t")
     print(100 * '=')
-    print("model name:", model_name)
+    print("Model Name:", model_name)
     print(f"model:\n", add_tab(model))
-    print(f"loss_func: {st.loss_func}")
-    print(f"optimizer: {st.optimizer}")
-    print(f"scheduler: {st.scheduler}")
+    # print(f"loss_func:\n", add_tab(class_str(loss_func)))
+    # print(f"optimizer:\n", add_tab(class_str(optimizer)))
+    # print(f"scheduler:\n", add_tab(class_str(scheduler)))
 
 
     print(100 * '-')
-    training_tracker = train(model, optimizer, scheduler, loss_func, train_loader, st, print_interval=print_interval, print_continuous=print_continuous, training_cancel_points=training_cancel_points)
+    training_tracker = train(model, optimizer, scheduler, loss_func, train_loader, st, print_interval=print_interval)
     # print("Training: Count per label:", training_tracker.get_count_per_label())
     # print("Training: Predictions per label:", training_tracker.get_predictions_per_label())
 

teng_ml/tracker/epoch_tracker.py

@@ -1,4 +1,3 @@
-from os import stat
 from ..util.data_loader import LabelConverter
 import matplotlib.pyplot as plt
 import matplotlib.colors as colors

teng_ml/util/data_loader.py

@@ -4,7 +4,6 @@ import re
 import numpy as np
 import pandas as pd
 from scipy.sparse import data
-import torch
 
 import threading
 
@@ -25,13 +24,7 @@ class LabelConverter:
         vec[self.class_labels.index(label)] = 1.0
         return vec
 
-    def get_label_index(self, one_hot: torch.Tensor):
-        """return one hot vector for given label"""
-        return int(torch.argmax(one_hot).item())
-
     def __getitem__(self, index):
-        if type(index) == torch.Tensor:
-            return self.class_labels[self.get_label_index(index)]
         return self.class_labels[index]
 
     def __contains__(self, value):
@@ -91,11 +84,8 @@ class Dataset:
             if split_function is None:
                 self.data.append((data, sample.label_vec))
             else:
-                try:
                 for data_split in split_function(data):
                     self.data.append((data_split, sample.label_vec))
-                except ValueError as e:
-                    raise ValueError(f"Exception occured during splitting of sample '{sample.datapath}': {e}")
 
     def apply_transforms(self, data):
         if type(self.transforms) == list:
@@ -121,9 +111,7 @@ def get_datafiles(datadir, labels: LabelConverter, exclude_n_object=None, filter
     files.sort()
     for file in files:
         match = re.fullmatch(re_filename, file)
-        if not match:
-            print(f"get_datafiles: dropping non matching file '{file}'")
-            continue
+        if not match: continue
 
         label = match.groups()[1]
         if label not in labels: continue
@@ -137,16 +125,16 @@ def get_datafiles(datadir, labels: LabelConverter, exclude_n_object=None, filter
     return datafiles
 
 
-def load_datasets(datadir, labels: LabelConverter, transforms=None, split_function=None, exclude_n_object=None, voltage=None, train_to_test_ratio=0.7, random_state=None, num_workers=None):
+def load_datasets(datadir, labels: LabelConverter, transforms=None, split_function=None, voltage=None, train_to_test_ratio=0.7, random_state=None, num_workers=None):
     """
     load all data from datadir that are in the format: yyyy-mm-dd_label_x.xV_xxxmm.csv
     """
     datasamples = []
     if num_workers == None:
-        for file, match, label in get_datafiles(datadir, labels, exclude_n_object=exclude_n_object, filter_voltage=voltage):
+        for file, match, label in get_datafiles(datadir, labels, voltage):
             datasamples.append(Datasample(*match.groups(), labels.get_one_hot(label), file))
     else:
-        files = get_datafiles(datadir, labels, exclude_n_object=exclude_n_object, filter_voltage=voltage)
+        files = get_datafiles(datadir, labels, voltage)
         def worker():
             while True:
                 try:
@@ -167,30 +155,3 @@ def load_datasets(datadir, labels: LabelConverter, transforms=None, split_functi
     train_dataset = Dataset(train_samples, transforms=transforms, split_function=split_function)
     test_dataset = Dataset(test_samples, transforms=transforms, split_function=split_function)
     return train_dataset, test_dataset
-
-
-def count_data(data_loader, label_converter: LabelConverter, print_summary=False):
-    """
-    @param data_loader: unbatched data loader
-    """
-    n_sequences = 0  # count number of sequences
-    labels = [ 0 for _ in range(len(label_converter)) ]     # count number of sequences per label
-    len_data = [ 0 for _ in range(len(label_converter)) ]   # count number of datapoints per label
-    for i, (data, y) in enumerate(data_loader):
-        n_sequences = i
-        label_i = label_converter.get_label_index(y)
-        len_data[label_i] += data.shape[0]
-        labels[label_i] += 1
-    if print_summary:
-        print("=" * 50)
-        print("Dataset summary" + f" for {print_summary}:" if type(print_summary) == str else ":")
-        print(f"Number of sequences: {n_sequences}")
-        for i in range(len(label_converter)):
-            print(f"- {label_converter[i]:15}: {labels[i]:3} sequences, {len_data[i]:5} datapoints")
-
-    return n_sequences, labels, len_data
-
-
-
-
-

teng_ml/util/pad.py

@@ -1,14 +0,0 @@
-import torch
-import torch.nn.utils.rnn as rnn
-import numpy as np
-
-class PadSequences:
-    def __call__(self, batch):
-        # batch = [(data, label)]
-        # sort by length
-        sorted_batch = sorted(batch, key=lambda sample: sample[0].shape[0], reverse=True)
-        sequences = [torch.Tensor(sample[0]) for sample in sorted_batch]
-        labels = torch.Tensor(np.array([sample[1] for sample in sorted_batch]))
-        lengths = torch.IntTensor(np.array([seq.shape[0] for seq in sequences]))
-        sequences_padded = rnn.pad_sequence(sequences, batch_first=True)
-        return sequences_padded, lengths, labels

teng_ml/util/split.py

@@ -5,12 +5,8 @@ class DataSplitter:
     Split a numpy array into smaller arrays of size datapoints_per_split
     If data.shape(0) % datapoints_per_split != 0, the remaining datapoints are dropped
     """
-    def __init__(self, datapoints_per_split, drop_if_smaller_than=-1):
-        """
-        @param drop_if_smaller_than: drop the remaining datapoints if the sequence would be smaller than this value. -1 means drop_if_smaller_than=datapoints_per_split
-        """
+    def __init__(self, datapoints_per_split):
         self.split_size = datapoints_per_split
-        self.drop_threshhold = datapoints_per_split if drop_if_smaller_than == -1 else drop_if_smaller_than
 
     def __call__(self, data: np.ndarray):
         """
@@ -19,11 +15,6 @@ class DataSplitter:
         ret_data = []
         for i in range(self.split_size, data.shape[0], self.split_size):
             ret_data.append(data[i-self.split_size:i, :])
-
-        rest_start = len(ret_data) * self.split_size
-        if len(data) - rest_start >= self.drop_threshhold:
-            ret_data.append(data[rest_start:,:])
-
         if len(ret_data) == 0:
             raise ValueError(f"data has only {data.shape[0]}, but datapoints_per_split is set to {self.split_size}")
         return ret_data

teng_ml/util/string.py

@@ -13,50 +13,25 @@ def fill_and_center(s: str, fill_char="=", length=100):
     else:
         return s
 
-
 def class_str(x):
     """
     Return the constructor of the class of x with arguemnts
     """
     name = type(x).__name__
-    params = []
-    try:
     signature = inspect.signature(type(x))
+    params = []
     for param_name, param_value in x.__dict__.items():
         if param_name not in signature.parameters:
             continue
         default_value = signature.parameters[param_name].default
         if param_value != default_value:
             params.append(f"{param_name}={param_value!r}")
-    except ValueError:
-        pass
     if params:
         return f"{name}({', '.join(params)})"
     else:
         return name
 
 
-def optimizer_str(x):
-    # optimizer stores everything in 'defaults' dict and is thus not compatible with class_str
-    name = type(x).__name__
-    params = []
-    try:
-        signature = inspect.signature(type(x))
-        for param_name, param_value in x.__dict__["defaults"].items():
-            if param_name not in signature.parameters:
-                continue
-            default_value = signature.parameters[param_name].default
-            if param_value != default_value:
-                params.append(f"{param_name}={param_value!r}")
-    except ValueError:
-        pass
-    if params:
-        return f"{name}({', '.join(params)})"
-    else:
-        return name
-
-
-
 def cleanup_str(s):
     """
     convert to string if necessary and