大约有 6,400 项符合查询结果（耗时：0.0197秒） [XML]
Python argparse command line flags without arguments
...p a switch by setting a variable True or False, have a look at http://docs.python.org/dev/library/argparse.html#action (specifically store_true and store_false)
import argparse
parser = argparse.ArgumentParser()
parser.add_argument('-w', action='store_true')
where action='store_true' implies def...
When should I create a destructor?
...ed Feb 4 '11 at 13:58
Øyvind BråthenØyvind Bråthen
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python pandas remove duplicate columns
... Lovely solution but on April 26, 2017 I got /usr/local/lib/python3.5/dist-packages/ipykernel_launcher.py:17: DeprecationWarning: 'pandas.core.common.array_equivalent' is deprecated and is no longer public API
– George Fisher
Apr 26 '17 at 12:35
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How to urlencode data for curl command?
... It fails to work for me in Bash 4.3.11(1). The string Jogging «à l'Hèze» generates Jogging%20%abà%20l%27Hèze%bb that cannot be feed to JS decodeURIComponent :(
– dmcontador
Nov 19 '15 at 12:07
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Send message to specific client with socket.io and node.js
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I am Python/PHP programmer and I am new to sockets and node, question is, why do we need to increment seq number of same user each second? is that just for demo?
– Umair Ayub
Sep 11 '18 at 10...
CSS '>' selector; what is it? [duplicate]
...ered Dec 16 '10 at 10:44
David MårtenssonDavid Mårtensson
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How can I debug javascript on Android?
...ered Oct 13 '11 at 7:20
Mads MobækMads Mobæk
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List comprehension rebinds names even after scope of comprehension. Is this right?
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List comprehensions leak the loop control variable in Python 2 but not in Python 3. Here's Guido van Rossum (creator of Python) explaining the history behind this:
We also made another change in Python
3, to improve equivalence between list
comprehensions and generator
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On design patterns: When should I use the singleton?
The glorified global variable - becomes a gloried global class. Some say breaking object-oriented design.
19 Answers
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Calculate difference in keys contained in two Python dictionaries
Suppose I have two Python dictionaries - dictA and dictB . I need to find out if there are any keys which are present in dictB but not in dictA . What is the fastest way to go about it?
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