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How do I split a list into equally-sized chunks?
(72 answers)
Closed 5 months ago.
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Original close ….
What is the most idiomatic way to do the following?
def xstr(s):
if s is None:
return ”
else:
return s
s = xstr(a) + xstr(b)
update: I’m incorporating Tryptich’s suggestion to use str(s), which makes this routine work for other types besides strings. I’m awfully impressed by Vinay Sajip’s lambda suggestion, but I want t….
This question already has answers here:
How do I merge two dictionaries in a single expression?
(43 answers)
Closed 9 years ago.
How do you calculate the union of two dict objects in Python, where a (key, value) pair is present ….
I’d like to know the best way (more compact and “pythonic” way) to do a special treatment for the last element in a for loop. There is a piece of code that should be called only between elements, being suppressed in the last one.
Here is how I currently do it:
for i, data in enumerate(data_list):
code_that_is_done_for_every_element
if i !=….
I’m calling a bunch of methods that return a list. The list may be empty. If the list is non-empty, I want to return the first item; otherwise, I want to return None. This code works:
def main():
my_list = get_list()
if len(my_list) > 0:
return my_list[0]
return None
but it seems to me that there should be a simple one-line….
What does this do, and why should one include the if statement?
if __name__ == “__main__”:
print(“Hello, World!”)