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Python dictionary: Get list of values for list of keys
...emgetter(*mykeys)(mydict)
# use `list(...)` if list is required
Note: in Python3, map returns an iterator rather than a list. Use list(map(...)) for a list.
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Using pickle.dump - TypeError: must be str, not bytes
I'm using python3.3 and I'm having a cryptic error when trying to pickle a simple dictionary.
2 Answers
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hasNext in Python iterators?
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I'm with Python3 and this code gives me TypeError: iter() returned non-iterator
– madtyn
Sep 14 '17 at 13:35
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Pickle or json?
...k, but I had an existing game where it was saving the levels using pickle (python3). I wanted to try jsonpickle for the human readable aspect - however the level saves were sadly much slower. 1597ms for jsonpickle and 88ms or regular pickle on level save. For level load, 1604ms for jsonpickle and 38...
In-place type conversion of a NumPy array
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It seems to work perfectly in python3.3 with the latest numpy version.
– CHM
Oct 10 '13 at 21:41
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Python list directory, subdirectory, and files
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In Python3 use parenthesis for print function print(os.path.join(path, name))
– Ehsan
Aug 7 at 11:31
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Auto reloading python Flask app upon code changes
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or pyvenv in python3.5, flask run also works, since when you pip install flask, a flask executable file is also installed in the venv/bin/ folder.
– TonyTony
Jan 4 '17 at 14:00
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How to print a string in fixed width?
...t;5}' indicates the argument’s index passed to str.format().
Edit 2:
In python3 one could use also f-string:
sub_str='s'
for i in range(1,6):
s = sub_str*i
print(f'{s:>5}')
' s'
' ss'
' sss'
' ssss'
'sssss'
or:
for i in range(1,5):
s = sub_str*i
print(f'{s:&...
A Regex that will never be matched by anything
...r regarding timing, as I found the exact opposite measured with timeit and python3.
– nivk
Nov 4 '17 at 20:59
It's not...
How do I make python wait for a pressed key?
...on 2, is to use raw_input():
raw_input("Press Enter to continue...")
In python3 it's just input()
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