Python implements three methods to process one character each time, and python three methods

Python implements three methods to process one character each time, and python three methods

This example describes three methods for python to process a single character each time. Share it with you for your reference.

The specific method is as follows:

a_string = "abccdea"  print 'the first' for c in a_string:   print ord(c)+1     print "the second"   result = [ord(c)+1 for c in a_string] print result  print "the thrid"  def do_something(c):   return ord(c)+1  result = map(do_something ,a_string) print result 

The output is as follows:

the first 98 99 100 100 101 102 98 the second [98, 99, 100, 100, 101, 102, 98] the thrid [98, 99, 100, 100, 101, 102, 98] 

I hope this article will help you with Python programming.

Python handles string processing issues in files:

The answer for the upstairs is changed to the first line.
F1 = open('1.txt ')
No other problems

However, there is a simpler way:

F1 = open('1.txt ')

Linen = 1

For line in reader:
If not line. find ('44. 2% ') =-1:
Print linen
Linen + = 1

F1.close ()

If it is helpful to you, please remember to adopt a satisfactory answer. Thank you! Wish you a happy life!
 
How does python retrieve a string from a file?

If the file is not large
Import re
F = open ('xxxx. xx', 'R'). read ()
FList = re. split (R' \ s + ', f)

OK. All of them are included in the fList list.