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What does “SyntaxError: Missing parentheses in call to 'print'” mean in Python?
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Add the line from future import print_function in your 2.7 file to add new python 3 print() lines to your code. Hence the code becomes compatible to 2.7+ and 3.0+
– MasterControlProgram
Oct 24 '16 at 11:20
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Format floats with standard json module
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This solution does not work in Python 2.7 using Python's C version of the JSON encoder.
– Nelson
Apr 6 '11 at 23:14
25
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How to delete items from a dictionary while iterating over it?
...ct[k]
My favorite approach is usually to just make a new dict:
# Python 2.7 and 3.x
mydict = { k:v for k,v in mydict.items() if k!=val }
# before Python 2.7
mydict = dict((k,v) for k,v in mydict.iteritems() if k!=val)
sh...
Print in one line dynamically
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Change print item to:
print item, in Python 2.7
print(item, end=" ") in Python 3
If you want to print the data dynamically use following syntax:
print(item, sep=' ', end='', flush=True) in Python 3
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Simplest way to detect a mobile device in PHP
...('/(android|bb\d+|meego).+mobile|avantgo|bada\/|blackberry|blazer|compal|elaine|fennec|hiptop|iemobile|ip(hone|od)|iris|kindle|lge |maemo|midp|mmp|netfront|opera m(ob|in)i|palm( os)?|phone|p(ixi|re)\/|plucker|pocket|psp|series(4|6)0|symbian|treo|up\.(browser|link)|vodafone|wap|windows (ce|phone)|xda...
Any gotchas using unicode_literals in Python 2.6?
...h should always work, for all combinations of unicode_literals and Python {2.7, 3.x} usage:
from __future__ import unicode_literals
bstr = b'\xa4'
assert eval(repr(bstr)) == bstr # fails in Python 2.7, holds in 3.1+
ustr = '\xa4'
assert eval(repr(ustr)) == ustr # holds in Python 2.7 and 3.1+
Th...
中文网（自研/维护）拓展 · App Inventor 2 中文网
... 教育 入门必读 中文教程 IoT专题 AI2拓展 ChatGPT接入 Aia Store 开通VIP 搜索 中文网（自研/维护）拓展 ...
BaseException.message deprecated in Python 2.6
... question's sample code, this will replicate the warning in Python 2.6 and 2.7, if you have warnings turned on (via the -W flag, the PYTHONWARNINGS environment variable, or the warnings module):
>>> error = Exception('foobarbaz')
>>> error.message
__main__:1: DeprecationWarning: B...
How to flush output of print function?
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Python 2 (or < 3.3)
They did not backport the flush argument to Python 2.7 So if you're using Python 2 (or less than 3.3), and want code that's compatible with both 2 and 3, may I suggest the following compatibility code. (Note the __future__ import must be at/very "near the top of your module")...
psycopg2: insert multiple rows with one query
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New execute_values method in Psycopg 2.7:
data = [(1,'x'), (2,'y')]
insert_query = 'insert into t (a, b) values %s'
psycopg2.extras.execute_values (
cursor, insert_query, data, template=None, page_size=100
)
The pythonic way of doing it in Psycopg 2.6:
d...