python – different behavior of print(*generator, )

Question Please help understand why the two cases act differently although both use a generator (i for i in range(5)). >>> print(i for i in range(5)) <generator object at …

Define a generator which updates global variables before the first __next__() call

Given the following function in python I would like to update the global variable before calling “next()”. Let me show it to you with an example. # some script happening before # a (global)…

What type of iterable is “x for x in y”?

I’ve been confused of list comprehension in Python, although its shorthand doing for loop is very convenient. I’m not sure if what’s in the join() function’s parameter below is list comprehension …

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, …

Tracking how many elements processed in generator

I have a problem in which I process documents from files using python generators. The number of files I need to process are not known in advance. Each file contain records which consumes considerable …

Misunderstood python yield

This code below works correct : def file_gen(f_name): f = open(f_name) for line in f: yield line gen_line = file_gen(“foo.html”) gen_line.next() # ‘n’ gen_line.next(…

Merge of lazy streams (using generators) in Python

I’m playing with functional capacities of Python 3 and I tried to implement classical algorithm for calculating Hamming numbers. That’s the numbers which have as prime factors only 2, 3 or 5. First …

Understanding generators in Python

I am reading the Python cookbook at the moment and am currently looking at generators. I’m finding it hard to get my head round. As I come from a Java background, is there a Java equivalent? The book …