Python basic learning notes (s t r method on the third day), python learning notes

Python basic learning notes (s t r method on the third day), python learning notes

Seven important functions

# '_'. Join ("as") concatenates each element in the string according to the specified separator
# Split remove a specified string for segmentation
# Find from the beginning, find the first one, and obtain its location
# Strip removes the white space on both sides of the string. lstrip and rstrip remove the white space on the left and right
# Upper converts all strings to uppercase. isupper determines whether the string is uppercase. true is returned. Otherwise, false is returned.
# Lower converts all strings to lower-case islower to determine whether the string is in lower-case. true is returned. Otherwise, false is returned.
# Replace (old, new [, max]) replaces the old (old string) in the string with new (new String). If the third parameter max is specified, the replacement cannot exceed max.