How do you manage script?

[kucingkembar]

sorry for my bad English,
I have a lot of "subscripts" like this:

#trim whitespace start and end
txt = "     Hello!  "
strippedtxt = txt.strip()
print(strippedtxt)

#Make all text Uppercase
txt = "Hello my friends"
x = txt.upper()
print(x)

#Make all text Lowercase
txt = "Hello my friends"
x = txt.lower()
print(x)

#Make all text like proper in excel
txt = "Hello my friends"
x = txt.title()
print(x)

if the scripts are under 10, it quite easy to find,
but if you have over 100, it is quite hard to manage,
of course, you can google it, but sometimes google-ing requires times like over 20+ minutes to extract that specific code,
sadly, you have that "specific code" working perfectly, but you can't find it where put it,

so, any tips, software, or idea to handle this?

thank you have a nice day