String Processing - 36 Days - Learn Python Online for 100 Days

Jun 13, 2023#python学习24

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AI-generated summary

Today's lesson is about manipulating strings. The functions discussed include string.lower(), string.upper(), string.title(), string.capitalize(), and string.strip(). The order of these functions is important when applying them to a string. An exercise is given to create a contact list program that does not allow duplicate names.

Record#

Today I learned about string manipulation.
1. string.lower() = converts all letters to lowercase.
2. string.upper() = converts all letters to uppercase.
3. string.title() = capitalizes the first letter of each word.
4. string.capitalize() = capitalizes the first letter of the first word.
5. string.strip() = removes leading and trailing whitespace.
When manipulating strings, it is important to pay attention to the order of functions. For example, in the string = ' phone'.capitalize().strip(), the result after execution is 'phone', not 'Phone'. This is because capitalize() capitalizes the letter after removing whitespace.
Today's exercise: Create an address book program that does not allow duplicates.

namelist = []
while True:
  firstname = input("First Name: ").title()
  lastname = input("Last Name: ").title()
  myname = f"{firstname} {lastname}"
  if myname not in namelist:
    namelist.append(myname)
    print(myname)
  else:
    print("ERROR: Duplicate name")