標籤:__name__ etc pen think local /dev/null cer lib inpu
1.讀寫檔案
讀檔案:
f = open("1.txt") text = f.readlines() print(text)
寫檔案:
f = open("2.txt",'w')encoding='utf-8' f.write("Hello World!") f.close()
代碼:
class File(): ENCODING = "utf-8" def wirteFile(self): filename = input("Please input the file name: ") f = codecs.open(filename,'w',encoding=File.ENCODING) while 1: context = input("Please input the file context: ") if context == "EOF": break f.write(context) f.write("\n") def readFile(self): print("####################STAT######################") readfile = input("Please input your read file name: ") fileread = codecs.open(readfile,encoding=File.ENCODING) readContext = fileread.read() print(readContext) print("################### END ######################") fileread.close()if __name__ == '__main__': import codecs File = File() File.wirteFile() File.readFile()
執行過程:
Please input the file name: fxq.logPlease input the file context: Hello world!Please input the file context: My name is FengxiaoqingPlease input the file context: I'm 30Please input the file context: I'm a bright boy.lPlease input the file context: Think you very much!Please input the file context: EOF####################STAT######################Please input your read file name: fxq.logHello world!My name is FengxiaoqingI'm 30I'm a bright boy.lThink you very much!################### END ######################進程已結束,結束代碼0
2. 檔案方法
檔案常用方法:
readline()
readlines()
next()
read()
write() 寫入的是字串
writelines() 參數是序列,比如列表,它會迭代幫你 寫入檔案
檔案屬性:
f.name
f.closed
f.encoding
f.mode
with用法:
with codec.open("1.log",encoding= "utf-8") as f: print(f.read())
3.python2的亂碼問題
python2中:
import sys
reload(sys)
print(sys.getdefaultencoding())
4.python對passwd檔案進行排序
密碼檔案:
[[email protected] ~]# cat passwd.txtroot:x:0:0:root:/root:/bin/bashbin:x:1:1:bin:/bin:/sbin/nologindaemon:x:2:2:daemon:/sbin:/sbin/nologinadm:x:3:4:adm:/var/adm:/sbin/nologinlp:x:4:7:lp:/var/spool/lpd:/sbin/nologinsync:x:5:0:sync:/sbin:/bin/syncshutdown:x:6:0:shutdown:/sbin:/sbin/shutdownhalt:x:7:0:halt:/sbin:/sbin/haltmail:x:8:12:mail:/var/spool/mail:/sbin/nologinoperator:x:11:0:operator:/root:/sbin/nologingames:x:12:100:games:/usr/games:/sbin/nologinftp:x:14:50:FTP User:/var/ftp:/sbin/nologinnobody:x:99:99:Nobody:/:/sbin/nologinsystemd-bus-proxy:x:999:997:systemd Bus Proxy:/:/sbin/nologinsystemd-network:x:192:192:systemd Network Management:/:/sbin/nologindbus:x:81:81:System message bus:/:/sbin/nologinpolkitd:x:998:996:User for polkitd:/:/sbin/nologinlibstoragemgmt:x:997:995:daemon account for libstoragemgmt:/var/run/lsm:/sbin/nologinrpc:x:32:32:Rpcbind Daemon:/var/lib/rpcbind:/sbin/nologintss:x:59:59:Account used by the trousers package to sandbox the tcsd daemon:/dev/null:/sbin/nologinntp:x:38:38::/etc/ntp:/sbin/nologinabrt:x:173:173::/etc/abrt:/sbin/nologinpostfix:x:89:89::/var/spool/postfix:/sbin/nologinsshd:x:74:74:Privilege-separated SSH:/var/empty/sshd:/sbin/nologinchrony:x:996:994::/var/lib/chrony:/sbin/nologintcpdump:x:72:72::/:/sbin/nologindockerroot:x:995:992:Docker User:/var/lib/docker:/sbin/nologinsaslauth:x:994:76:Saslauthd user:/run/saslauthd:/sbin/nologinmailnull:x:47:47::/var/spool/mqueue:/sbin/nologinsmmsp:x:51:51::/var/spool/mqueue:/sbin/nologin
代碼:
#/usr/bin/env python# -*- coding:utf-8 -*-# @time :2018/1/25 22:11# @Author :FengXiaoqing# @file :uidSort-Passwd.pyimport codecsfile = "passwd.txt"sortfile = "sortpasswd.txt"fileContext = []sortuid = []with codecs.open(sortfile,'wb') as fsort: with codecs.open(file,encoding='utf-8') as f: fileContext += f.readlines() for line in fileContext: sortuid.append(int(line.split(':')[2])) sortuid.sort() for uid in sortuid: for line in fileContext: if str(uid) == line.split(":")[2]: print(line) fsort.write(line.encode("utf-8"))
Python檔案管理、亂碼及對passwd檔案排序