Python tips 32 [common tips]

Obtain the name of the current machine:
From: http://tony413.iteye.com/blog/395177

Def Hostname ():
Sys = OS. Name

If Sys = ' NT ' :
Hostname = OS. getenv ( ' Computername ' )
Return Hostname

Elif Sys = ' POSIX ' :
Host = OS. popen ( ' Echo $ hostname ' )
Try :
Hostname = host. Read ()
Return Hostname
Finally :
Host. Close ()
Else :
Return ' Unkwon hostname '

 

Obtain the current job path:
From: http://www.cnblogs.com/Henrya2/archive/2009/01/16/1377284.html

Import OS

OS. getcwd ()

#Or

#OS. curdir just return. For current working directory.
#Need abspath () to get full path.
OS. Path. abspath (OS. curdir)

 

Obtain the temporary directory of the system:

OS. getenv ( ' Temp ' )

Conversion of string and INT, long, float:

Python variables seem to have no type, but they actually have a type.

Use atoi and atof In the locale module to convert a string to int or float, or directly use int (), float (), STR () to convert it. In earlier versions, atoi and atof are in the string module.

S = " 1233423423423423 "
Import Locale
Locale. atoi (s)
# 1233423423423423
Locale. atof (s)
# 1233423423423423.0
INT (s)
# 1233423423423423
Float (s)
# 1233423423423423.0
STR (0, 123434)
" 123434 "

 

Conversion of bytes and unicodestr:

From: http://blog.csdn.net/yatere/article/details/6606316

# Bytes object
B = B " Example "

# STR object
S = " Example "

# STR to bytes
Bytes (S, encoding = " Utf8 " )

# Bytes to Str
STR (B, encoding = " UTF-8 " )

# An alternative method
# STR to bytes
Str. encode (s)

# Bytes to Str
Bytes. Decode (B)

 

Write platform independentCodeRequired:

>>> Import OS
>>> OS. pathsep
' ; '
>>> OS. SEP
' \\ '
>>> OS. linesep
' \ R \ n '

 

 

Complete!