how to add or replace some character to sting separated by commas-CodePudding

I have some string and I want add small part to it. How can I achieve this in python?

string =ass34_ssa ass56_ssa ass78_ssa,ass93_ssa

for i in string :
i.replace("",",")

#i want the string to look like:

string =ass34_ssa,DER_ass56_ssa,DER_ass78_ssa,DER_ass93_ssa

CodePudding user response：

string = "ass34_ssa ass56_ssa ass78_ssa,ass93_ssa"

parts = string.split()
# if , is in the string, then split on that
for i in range(len(parts)):
    if "," in parts[i]:
        p1, p2 = parts[i].split(",")
        # remove the old part
        parts.pop(i)
        # insert the new parts
        parts.extend([p1, p2])

new_string = ""
for part in parts:
    if "34" not in part:
        new_string  = "DER_"   part
        if part != parts[-1]:
            new_string  = ","
    else:
        new_string  = part   ","

print(new_string)

First, divide the strings into parts if there is a comma in string then further divide that part and add to parts.

2nd, You can add any logic in the 2nd for loop like this if "34" not in part.

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