大约有 40,000 项符合查询结果（耗时：0.0304秒） [XML]
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
...
It seems to work perfectly in python3.3 with the latest numpy version.
– CHM
Oct 10 '13 at 21:41
1
...
Python list directory, subdirectory, and files
...
In Python3 use parenthesis for print function print(os.path.join(path, name))
– Ehsan
Aug 7 at 11:31
ad...
Auto reloading python Flask app upon code changes
...
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
...
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...
Getting the exception value in Python
...can add a exc_info=True to our logging function to not miss the error.
For python3, I think it's safe to use str(e).
share
|
improve this answer
|
follow
|
...
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()
share
|
improve this answer
|
follow
|
...
Python import csv to list
...
Update for Python3:
import csv
from pprint import pprint
with open('text.csv', newline='') as file:
reader = csv.reader(file)
res = list(map(tuple, reader))
pprint(res)
Output:
[('This is the first line', ' Line1'),
('Thi...
Removing all non-numeric characters from string in Python
...both strings and unicode objects in Python2, and both strings and bytes in Python3:
# python <3.0
def only_numerics(seq):
return filter(type(seq).isdigit, seq)
# python ≥3.0
def only_numerics(seq):
seq_type= type(seq)
return seq_type().join(filter(seq_type.isdigit, seq))
...