It’s a bit annoying that tf.keras generator still faces this issue, unlike pytorch. There are many discussions regarding this, however, still stuck with it. Already visit: Meaning of validation_steps in Keras steps_per_epoch does not fit into numbers of samples Problem I have a data set consist of aroun…
Tag: generator
Generator function for file reading returning object type as regular function
I am trying to create a generator function to return the content of a .csv file row by row and while the generator function does seem to be iterable with me being able to loop over it with a for loop, when I print the object type of the generator function, instead of returning class ‘generator’, i…
Keras image generator keep giving different number of labels
I am trying to make a simple fine turned Resnet50 model using the Market1501 dataset and keras. So the data set contains images (12000 or so) and 751 labels that I want to use (0-750). I can fit the data into a single go so I have to use a image generator for this. So my base model is like
How to solve StopIteration error in Python?
I have just read a bunch of posts on how to handle the StopIteration error in Python, I had trouble solving my particular example.I just want to print out from 1 to 20 with my code but it prints out error StopIteration. My code is:(I am a completely newbie here so please don’t block me.) Answer Any time…
Error handling for list comprehension in Python
Is there a way to handle errors in a python list comprehension. Preferably I would have something like this where the last two values are represented by None: This throws a syntax error and the only way I can do it is: I hope there is a more ‘neat’ way of doing this because the current solution is…
How does a generator function work internally?
Below is a generator function. Does this generator function (f) get implemented, internally, as shown below? Edit: This is the answer for my question. Answer Internally, a generator works about the same as a regular function call. Under-the-hood, running generators and running functions use mostly the same ma…
How to write a generator class?
I see lot of examples of generator functions, but I want to know how to write generators for classes. Lets say, I wanted to write Fibonacci series as a class. Output: Why is the value self.a not getting printed? Also, how do I write unittest for generators? Answer How to write a generator class? You’re …
How to make a nested for loop using a generator in python?
I’m trying to convert this nested for loop: to a one liner, something like this: But I’m getting this error: all_R is a defaultdict where every value has keys that are pairs, and I’m interested in just one value from that pair: Answer List comprehensions are written in the same order as for …
Remove duplicate JSON objects from list in python
I have a list of dict where a particular value is repeated multiple times, and I would like to remove the duplicate values. My list: function to remove duplicate values: When I call this function I get generator object. When I try to iterate over the generator I get TypeError: unhashable type: ‘dictR…
Simplest way to get the first n elements of an iterator
How can I get the first n elements of an iterator (generator) in the simplest way? Is there something simpler than, e. g. I can’t think of a nicer way, but maybe there is? Maybe a functional form? Answer Use itertools.islice(): This will yield the next 3 elements from it, then stop.