Demand:
Python handles renamed strings, adding or incrementing numeric string suffixes
- For 2 renamed strings, add a numeric suffix, such as two duplicate strings
s1 = “name”,s2 = “name”, set the name of s2 toname_1 - Corresponding to 3 or more renamed strings, the numeric part is realized incrementally, initially
s1=s2=s3=“name", renamed to gets1=“name”,s2=“name_1”,s3=“name_2”
To handle strings flexibly, it is most convenient to use the re module. Here is a way to increment a string with an underscore + a number as a suffix.
def increase_string_suffix(s, incr_num=1):
"""
With numerical suffix "_d"The string self-increment method of "name_1" Add 1 --> "name_2"
Example
-----------------
>>> s = "name_01"
>>> increase_string_suffix(s, incr_num=2)
'name_03'
"""
suffix_searched = (r"(_)(\d+)$", s)
if suffix_searched:
suffix_plus_1 = (
r"(_)(\d+)$",
lambda x: f"{(1)}{str(int((2)) + incr_num).zfill(len((2)))}",
s
)
else:
suffix_plus_1 = f"{s}_1"
return suffix_plus_1The example can be run directly in the code in the doc section of the comments, the parameter s is the string to be passed in, and incr_num is the number of steps to be incremented at a time
The core part of the code is the method, r"(_)(\d+)$" is to match the search part, () to match the part of the group, (1) is () matched to the "", (2) is matched to the number of parts, zfill to the left to fill in the length of the 0 fill in the length of the, for example, 01 → 02 and not 01 → 2
It is also possible to write a decreasing, or modifying, prefixed
Example:
def increase_string_prefix(s, incr_num=1):
"""
With numeric prefix "d-"The string self-increment method of "1-name" Add 1 --> "2-name"
Example
-----------------
>>> s = "1-name"
>>> increase_string_prefix(s, incr_num=1)
'2-name'
"""
prefix_searched = (r"^(\d+)(-)", s)
if prefix_searched:
prefix_plus_1 = (
r"^(\d+)(-)",
lambda x: f"{str(int(()[0]) + incr_num).zfill(len(()[0]))}{()[1]}",
s
)
else:
prefix_plus_1 = f"1-{s}"
return prefix_plus_1For more on how to use regular expressions, see the previousthis article
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