大约有 47,000 项符合查询结果（耗时：0.0754秒） [XML]
Get path of executable
...
|
edited Nov 20 '17 at 6:57
James Mart
42033 silver badges1313 bronze badges
answered Oct 6 ...
Case preserving substitute in Vim
...toMark Lodato
37.4k55 gold badges3737 silver badges3030 bronze badges
16
...
What is the difference between BIT and TINYINT in MySQL?
...
answered Nov 14 '08 at 14:39
Robert GambleRobert Gamble
94.3k2121 gold badges139139 silver badges135135 bronze badges
...
Understanding slice notation
...
answered Feb 3 '09 at 22:48
Greg HewgillGreg Hewgill
783k167167 gold badges10841084 silver badges12221222 bronze badges
...
How to read a .xlsx file using the pandas Library in iPython?
... for sheet_name in xl_file.sheet_names}
Update: In pandas version 0.21.0+ you will get this behavior more cleanly by passing sheet_name=None to read_excel:
dfs = pd.read_excel(file_name, sheet_name=None)
In 0.20 and prior, this was sheetname rather than sheet_name (this is now deprecat...
Pandas dataframe get first row of each group
...column:
>>> df.groupby('id').first().reset_index()
id value
0 1 first
1 2 first
2 3 first
3 4 second
4 5 first
5 6 first
6 7 fourth
To get n first records, you can use head():
>>> df.groupby('id').head(2).reset_index(drop=True)
id value
0 ...
Insert a row to pandas dataframe
...df.sort_index() # sorting by index
And you get, as desired:
A B C
0 2 3 4
1 5 6 7
2 7 8 9
See in Pandas documentation Indexing: Setting with enlargement.
share
|
improve this an...
How to create custom easing function with Core Animation?
...tric.h:
// this should be a function that takes a time value between
// 0.0 and 1.0 (where 0.0 is the beginning of the animation
// and 1.0 is the end) and returns a scale factor where 0.0
// would produce the starting value and 1.0 would produce the
// ending value
typedef double (^KeyframePa...
Programmatically create a UIView with color gradient
...
702
Objective-C:
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 50)];
CAGradie...
Is SQL or even TSQL Turing Complete?
...
Qantas 94 Heavy
14.4k1616 gold badges6060 silver badges7777 bronze badges
answered Sep 28 '11 at 7:59
Jan de VosJan de Vos
...