大约有 42,000 项符合查询结果(耗时:0.0483秒) [XML]
Xcode/Simulator: How to run older iOS version?
...ut what I'm wondering is if I'll still be able to run the simulator as iOS 3.2. This is because I'm creating iAds for iPad but I still want to check if my program will run with iOS 3.2.
...
Syntax error on print with Python 3 [duplicate]
Why do I receive a syntax error when printing a string in Python 3?
3 Answers
3
...
Is generator.next() visible in Python 3?
...
3 Answers
3
Active
...
Repeat each row of data.frame the number of times specified in a column
...), 1:2]
Result:
var1 var2
1 a d
2 b e
2.1 b e
3 c f
3.1 c f
3.2 c f
share
|
improve this answer
|
follow
|
...
What's the difference between lists enclosed by square brackets and parentheses in Python?
...you can change its contents:
>>> x = [1,2]
>>> x.append(3)
>>> x
[1, 2, 3]
while tuples are not:
>>> x = (1,2)
>>> x
(1, 2)
>>> x.append(3)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: '...
Python “extend” for a dictionary
...
phoenix
3,20611 gold badge2727 silver badges3131 bronze badges
answered Feb 23 '09 at 11:01
Nick FortescueNic...
Pandas groupby: How to get a union of strings
...
In [5]: df
Out[5]:
A B C
0 1 0.749065 This
1 2 0.301084 is
2 3 0.463468 a
3 4 0.643961 random
4 1 0.866521 string
5 2 0.120737 !
In [6]: df.dtypes
Out[6]:
A int64
B float64
C object
dtype: object
When you apply your own function, t...
Numbering rows within groups in a data frame
...
answered Oct 16 '12 at 23:41
mnelmnel
103k2424 gold badges240240 silver badges239239 bronze badges
...