Python string manipulation (string substitution, delete, intercept, copy, join, compare, find, include, Case transform, split, etc.)

Go to spaces and special symbols

S.strip (). Lstrip (). Rstrip (', ')

Copy string

#strcpy (sstr1,sstr2) sStr1 = ' strcpy ' sStr2 = sstr1sstr1 = ' strcpy2 ' Print sStr2

Connection string

#strcat (sstr1,sstr2) sStr1 = ' strcat ' sStr2 = ' append ' sStr1 + = Sstr2print sStr1

Find characters

#strchr (SSTR1,SSTR2) # < 0 for not found sStr1 = ' strchr ' sStr2 = ' s ' nPos = Sstr1.index (sStr2) Print NPos

Comparing strings

#strcmp (sstr1,sstr2) sStr1 = ' strchr ' sStr2 = ' strch ' Print cmp (SSTR1,SSTR2)

Scans whether a string contains the specified character

#strspn (sstr1,sstr2) sStr1 = ' 12345678 ' sStr2 = ' 456 ' #sStr1 and chars both in SStr1 and Sstr2print Len (SSTR1 and SSTR2)

String length

#strlen (sStr1) sStr1 = ' strlen ' Print len (SSTR1)

Converts the case in a string

#strlwr (sStr1) sStr1 = ' jcstrlwr ' sStr1 = Sstr1.upper () #sStr1 = Sstr1.lower () print sStr1

Appends a string of the specified length

#strncat (sstr1,sstr2,n) sStr1 = ' 12345 ' sStr2 = ' abcdef ' n = 3sstr1 + = Sstr2[0:n]print sStr1

String specifying length Comparison

#strncmp (sstr1,sstr2,n) sStr1 = ' 12345 ' sStr2 = ' 123BC ' n = 3print cmp (sstr1[0:n],sstr2[0:n])

Copy characters of specified length

#strncpy (sstr1,sstr2,n) sStr1 = ' sStr2 = ' 12345 ' n = 3sstr1 = Sstr2[0:n]print sStr1

Replaces the first n characters of a string with the specified character

#strnset (sstr1,ch,n) sStr1 = ' 12345 ' ch = ' r ' n = 3SSTR1 = n * ch + sstr1[3:]print SSTR1

Scan string

#strpbrk (sstr1,sstr2) sStr1 = ' Cekjgdklab ' sStr2 = ' gka ' NPos = -1for C in sStr1:    if C in sStr2:        NPos = Sstr1.index (c )        Breakprint NPos

Flip string

#strrev (sStr1) sStr1 = ' ABCDEFG ' sStr1 = Sstr1[::-1]print sStr1

Find string

#strstr (sstr1,sstr2) sStr1 = ' ABCDEFG ' sStr2 = ' cde ' Print sstr1.find (SSTR2)

Split string

#strtok (sstr1,sstr2) sStr1 = ' Ab,cde,fgh,ijk ' sStr2 = ', ' sStr1 = Sstr1[sstr1.find (sStr2) + 1:]print sstr1# or s = ' ab,cde,fgh , Ijk ' Print (S.split (', '))

Connection string

delimiter = ', ' mylist = [' Brazil ', ' Russia ', ' India ', ' China ']print delimiter.join (mylist)

Implementation of Addslashes in PHP

def addslashes (s):    d = {' ' ': ' \ \ ' ', ' ' ': ' \ \ ', '/': ' \\\0 ', ' \ \ ': ' \\\\ '}    return '. Join (D.get (c, c) for C in s) s = "John ' Johny ' Doe (a.k.a. \" Super joe\ ") \\\0" Print sprint addslashes (s)

Show only letters and numbers

def onlycharnum (s,oth= "):    s2 = S.lower ();    Fomart = ' abcdefghijklmnopqrstuvwxyz0123456789 ' for    C in S2:        if not C in Fomart:            s = s.replace (c, ');    return s; Print (Onlystr ("a000 aa-b"))

Intercept string

str = ' 0123456789′
Print Str[0:3] #截取第一位到第三位的字符
Print str[:] #截取字符串的全部字符
Print Str[6:] #截取第七个字符到结尾
Print Str[:-3] #截取从头开始到倒数第三个字符之前
Print Str[2] #截取第三个字符
Print Str[-1] #截取倒数第一个字符
Print Str[::-1] #创造一个与原字符串顺序相反的字符串
Print Str[-3:-1] #截取倒数第三位与倒数第一位之前的字符
Print str[-3:] #截取倒数第三位到结尾
Print str[:-5:-3] #逆序截取, what do you mean, you don't understand?

Python string manipulation (string substitution, delete, intercept, copy, join, compare, find, include, Case transform, split, etc.)