python如何删除字符串中指定位置的字符？ python中如何删除指定位置前的字符 比如 21-2 删除...

python\u5220\u9664\u5b57\u7b26\u4e32\u4e2d\u6307\u5b9a\u4f4d\u7f6e\u5b57\u7b26

\u5b57\u7b26\u4e32\u7684\u8bdd,\u4f60\u53ef\u4ee5\u628a\u4ed6\u5f53\u4f5c\u5217\u8868\u5904\u7406\uff1a
str = 'hello world'
\u5982\u679c\u662f\u60f3\u53bb\u6389\u7b2c\u4e00\u4e2a\u5b57\u6bcd'o'\uff0c\u5e76\u4e14\u77e5\u9053\u662f\u7b2c5\u4e2a\u5b57\u7b26, index=4
1.\u4f7f\u7528\u5206\u7247 new_str = str[:4]+str[5:] ;
2.\u5faa\u73af\u8bfb\u53d6new_str = ''.join([str[i] for i in range(len(str)) if i!= 4]) ;
3.\u5b57\u7b26\u66ff\u6362new_str = str.replace('o','',1) #\u540e\u9762\u76841\u4ee3\u8868\u66ff\u6362\u7b2c\u4e00\u4e2a\u5339\u914d'o'\u7684\u5b57\u7b26 \u3002
Python(\u82f1\u8bed\u53d1\u97f3:/ˈpaɪ\u03b8ən/), \u662f\u4e00\u79cd\u9762\u5411\u5bf9\u8c61\u3001\u89e3\u91ca\u578b\u8ba1\u7b97\u673a\u7a0b\u5e8f\u8bbe\u8ba1\u8bed\u8a00\uff0c\u7531Guido van Rossum\u4e8e1989\u5e74\u5e95\u53d1\u660e\uff0c\u7b2c\u4e00\u4e2a\u516c\u5f00\u53d1\u884c\u7248\u53d1\u884c\u4e8e1991\u5e74\uff0cPython \u6e90\u4ee3\u7801\u540c\u6837\u9075\u5faa GPL(GNU General Public License)\u534f\u8bae\u3002Python\u8bed\u6cd5\u7b80\u6d01\u800c\u6e05\u6670\uff0c\u5177\u6709\u4e30\u5bcc\u548c\u5f3a\u5927\u7684\u7c7b\u5e93\u3002\u5b83\u5e38\u88ab\u6635\u79f0\u4e3a\u80f6\u6c34\u8bed\u8a00\uff0c\u80fd\u591f\u628a\u7528\u5176\u4ed6\u8bed\u8a00\u5236\u4f5c\u7684\u5404\u79cd\u6a21\u5757(\u5c24\u5176\u662fC/C++)\u5f88\u8f7b\u677e\u5730\u8054\u7ed3\u5728\u4e00\u8d77\u3002\u5e38\u89c1\u7684\u4e00\u79cd\u5e94\u7528\u60c5\u5f62\u662f\uff0c\u4f7f\u7528Python\u5feb\u901f\u751f\u6210\u7a0b\u5e8f\u7684\u539f\u578b(\u6709\u65f6\u751a\u81f3\u662f\u7a0b\u5e8f\u7684\u6700\u7ec8\u754c\u9762)\uff0c\u7136\u540e\u5bf9\u5176\u4e2d\u6709\u7279\u522b\u8981\u6c42\u7684\u90e8\u5206\uff0c\u7528\u66f4\u5408\u9002\u7684\u8bed\u8a00\u6539\u5199\uff0c\u6bd4\u59823D\u6e38\u620f\u4e2d\u7684\u56fe\u5f62\u6e32\u67d3\u6a21\u5757\uff0c\u6027\u80fd\u8981\u6c42\u7279\u522b\u9ad8\uff0c\u5c31\u53ef\u4ee5\u7528C/C++\u91cd\u5199\uff0c\u800c\u540e\u5c01\u88c5\u4e3aPython\u53ef\u4ee5\u8c03\u7528\u7684\u6269\u5c55\u7c7b\u5e93\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\u5728\u60a8\u4f7f\u7528\u6269\u5c55\u7c7b\u5e93\u65f6\u53ef\u80fd\u9700\u8981\u8003\u8651\u5e73\u53f0\u95ee\u9898\uff0c\u67d0\u4e9b\u53ef\u80fd\u4e0d\u63d0\u4f9b\u8de8\u5e73\u53f0\u7684\u5b9e\u73b0\u3002

\u5173\u4e8e\u60a8\u7684\u95ee\u9898\uff0c\u6211\u60f3\u5230\u4e09\u79cd\u601d\u8def
s = "21-2"

# \u65b9\u6cd5\u4e00\uff08\u901a\u7528\uff09
# \u627e\u5230\u2018-\u2019\u7684\u7d22\u5f15\u503c\uff0c\u7136\u540e\u52a0\u4e00\u53d6\u51fa\u51cf\u53f7\u540e\u9762\u7684\u503c
index = s.find('-')+1
print(s[index:])

# \u65b9\u6cd5\u4e8c\uff08\u624b\u5de5\u8ba1\u7b97\u4fbf\u5b9c\uff09
# \u6570\u504f\u79fb\u91cf
print(s[3:])

# \u65b9\u6cd5\u4e09\uff08\u53d6\u5de7\uff0c\u5229\u7528-\u5206\u9694\uff09
# \u5df2\u2018-\u2019\u4e3a\u5206\u9694\u7b26\uff0c\u53d6\u540e\u9762\u7684\u5185\u5bb9
print(s.split('-')[1])

#!/bin/env pythonimport shutil, sys, osdarray = [  "Entering directory",  "In function ",  "Leaving directory",  "__NR_SYSCALL_BASE",  "arm-hisiv100-linux-ar ",  "arm-hisiv100-linux-gcc ",  "but argument is of type",  "dereferencing type-punned pointer will break strict-aliasing rules",  "differ in signedness",  "does break strict-aliasing rules",  "embedded '\\0' in format",  "excess elements in array initializer",  "implicit declaration of",  "make -C ",  " rm -f",  "this is the location of the previous definition",  "warning: multi-line comment"]def isInArray (array, line):  for item in array:    if item in line:      return True  return Falseif __name__ == '__main__':  argv = sys.argv  argc = len(argv)  if argc < 2:    print "Usage: %s <file>" %(os.path.basename(argv[0]))    exit()  fname = argv[1]  fresult = fname + ".result"  with open(fname, 'r') as f:    with open(fresult, 'w') as g:      for line in f.readlines():        if not isInArray(darray, line):          g.write(line)

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