大约有 44,100 项符合查询结果（耗时：0.0546秒） [XML]
Set every cell in matrix to 0 if that row or column contains a 0
...
1
2
Next
96
...
Quicksort: Choosing the pivot
... a random pivot minimizes the chance that you will encounter worst-case O(n2) performance (always choosing first or last would cause worst-case performance for nearly-sorted or nearly-reverse-sorted data). Choosing the middle element would also be acceptable in the majority of cases.
Also, if you ...
How to click first link in list of items after upgrading to Capybara 2.0?
...al .item's so it raises an exception. I consider this behavior of Capybara 2 very good.
share
|
improve this answer
|
follow
|
...
Equation (expression) parser with precedence?
...
22 Answers
22
Active
...
Is there a list of Pytz Timezones?
...pytz.all_timezones:
In [40]: import pytz
In [41]: pytz.all_timezones
Out[42]:
['Africa/Abidjan',
'Africa/Accra',
'Africa/Addis_Ababa',
...]
There is also pytz.common_timezones:
In [45]: len(pytz.common_timezones)
Out[45]: 403
In [46]: len(pytz.all_timezones)
Out[46]: 563
...
Saving an Object (Data persistence)
...40)
pickle.dump(company1, output, pickle.HIGHEST_PROTOCOL)
company2 = Company('spam', 42)
pickle.dump(company2, output, pickle.HIGHEST_PROTOCOL)
del company1
del company2
with open('company_data.pkl', 'rb') as input:
company1 = pickle.load(input)
print(company1.name) # -> ...
Python: changing value in a tuple
...t you need to ask, why you want to do this?
But it's possible via:
t = ('275', '54000', '0.0', '5000.0', '0.0')
lst = list(t)
lst[0] = '300'
t = tuple(lst)
But if you're going to need to change things, you probably are better off keeping it as a list
...
python list by value not by reference [duplicate]
...
220
As answered in the official Python FAQ:
b = a[:]
...
How to “inverse match” with regex?
...
72
(?!Andrea).{6}
Assuming your regexp engine supports negative lookaheads..
Edit: ..or maybe yo...