大约有 16,000 项符合查询结果（耗时：0.0276秒） [XML]
Selecting a row of pandas series/dataframe by integer index
...access to the pandas table, one can also consider numpy.as_array option to convert the table to Numpy array as
np_df = df.as_matrix()
and then
np_df[i]
would work.
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How can I get the list of files in a directory using C or C++?
...r;
struct dirent *ent;
if ((dir = opendir ("c:\\src\\")) != NULL) {
/* print all the files and directories within directory */
while ((ent = readdir (dir)) != NULL) {
printf ("%s\n", ent->d_name);
}
closedir (dir);
} else {
/* could not open directory */
perror ("");
return EXIT...
Play audio with Python
...k like it can play .mp3 files without external libraries. You could either convert your .mp3 file to a .wav or other format, or use a library like PyMedia.
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Python datetime to string without microsecond component
...er answer says "take the current time, set the microseconds to 0, and then convert it to a string somehow".
– Sven Marnach
Jan 14 '14 at 14:41
3
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Find intersection of two nested lists?
...(set.intersection, it, set(next(it, []))). Both version doesn't require to convert all input lists to set. The latter is more memory efficient.
– jfs
Dec 5 '12 at 6:41
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How to view UTF-8 Characters in VIM or Gvim
...t fileencoding=utf8 option so you won't run into the most confusing "Can't convert some character" error when saving.
– Maxim Sloyko
Mar 4 '11 at 12:21
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What is the difference between 127.0.0.1 and localhost
...
Well, by IP is faster.
Basically, when you call by server name, it is converted to original IP.
But it would be difficult to memorize an IP, for this reason the domain name was created.
Personally I use http://localhost instead of http://127.0.0.1 or http://username.
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Check if a class is derived from a generic class
... The while loop will not break if the toCheck type is not a class (ie, interface). This will cause a NullReferenceException.
– JD Courtoy
Dec 23 '09 at 21:54
2
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SQL - HAVING vs. WHERE
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it's not a good example as you could convert : ` WHERE companyId = 884501253109 GROUP BY country, city HAVING country = 'MX' ` to: ` WHERE companyId = 884501253109, country = 'MX' GROUP BY city `
– Etienne Herlaut
Nov 8 '...
获取文件系统映像及恢复删除的数据（FAT文件系统格式描述） - C/C++ - 清泛...
...看看 FAT12/FAT16 的一些字段的意义。
36
BIOS int13h 磁盘号。
不
37
不用。
不
38
如果其值是 0x29 ，则下一个值有效。
不
39-42
卷数
不
...