'Best practice when substring is missing from string
I'm extracting data from an API and one of the fields is a string from which i want to extract multiple substrings(7 ideally). To get those substring I'm using the index() method.
string = r"""[Summary]
Reason: Not enough information
Improvements_Done: None
Improvements_Planned: Documentation
References_Improvements_Done: None
References_Improvements_Done: None
References_Improvements_Planned: www.link1.com
References_Improvements_Planned: www.link2.com
*** DEFAULT.....""".replace("\n", "\r\n")
Ex: imp_done_start = string.index('Improvements Done: ') + len('Improvements Done: ')
imp_done_end = string.index('Improvements_Planned')
imp_done = string[imp_done_start:imp_done_end]
There could be cases when one or more of these substrings(Reason ,Improvements_Done, Improvements_Planned etc) could be missing from the string. For example if "Improvements_Planned" is missing then i can't get the value for imp_done.
What is the best practice to handle these kind of cases?
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