string indexing in python
#cybertech24
#stringindexinginpython
#stringindexing
#PYTHON
str1 = "Hello" # A new string using double quotes
str2 = 'Hello' # Single quotes do the same
str3 = "Hello\tworld\n" # One with a tab and a newline
str4 = str1 + " world" # Concatenation
str5 = str1 + str(4) # Concatenation with a number
str6 = str1[2] # 3rd character
str6a = str1[-1] # Last character
#str1[0] = "M" # No way; strings are immutable
for char in str1: print char # For each character
str7 = str1[1:] # Without the 1st character
str8 = str1[:-1] # Without the last character
str9 = str1[1:4] # Substring: 2nd to 4th character
str10 = str1 * 3 # Repetition
str11 = str1.lower() # Lowercase
str12 = str1.upper() # Uppercase
str13 = str1.rstrip() # Strip right (trailing) whitespace
str14 = str1.replace('l','h') # Replacement
list15 = str1.split('l') # Splitting
if str1 == str2: print "Equ" # Equality test
if "el" in str1: print "In" # Substring test
length = len(str1) # Length
pos1 = str1.find('llo') # Index of substring or -1
pos2 = str1.rfind('l') # Index of substring, from the right
count = str1.count('l') # Number of occurrences of a substring
print str1, str2, str3, str4, str5, str6, str7, str8, str9, str10
print str11, str12, str13, str14, list15
print length, pos1, pos2, count
See also chapter Regular Expression for advanced pattern matching on strings in Python.
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