What’s the scope of a variable initialized in an if statement?
I’m new to Python, so this is probably a simple scoping question. The following code in a Python file (module) is confusing me slightly:
if-statement
Better to ‘try’ something and catch the exception or test if it’s possible first to avoid an exception?
Should I test if something is valid or just try to do it and catch the exception?
List comprehension with if statement
I want to compare 2 iterables and print the items which appear in both iterables.
Compare two columns using pandas
Using this as a starting point:
Most efficient way of making an if-elif-elif-else statement when the else is done the most?
I’ve got a in if-elif-elif-else statement in which 99% of the time, the else statement is executed:
Difference between multiple if’s and elif’s?
In python, is there a difference between say:
What is a None value?
I have been studying Python, and I read a chapter which describes the None value, but unfortunately this book isn’t very clear at some points. I thought that I would find the answer to my question, if I share it there.
Styling multi-line conditions in ‘if’ statements?
When the conditional part of an if -statement is long enough to require that it be written across multiple lines, it’s worth noting that the combination of a two character keyword (i.e. if ), plus a single space, plus an opening parenthesis creates a natural 4-space indent for the subsequent lines of the multiline conditional. This can produce a visual conflict with the indented suite of code nested inside the if -statement, which would also naturally be indented to 4 spaces. This PEP takes no explicit position on how (or whether) to further visually distinguish such conditional lines from the nested suite inside the if -statement. Acceptable options in this situation include, but are not limited to:
Putting an if-elif-else statement on one line?
I have read the links below, but it doesn’t address my question.
Does Python have a ternary conditional operator? (the question is about condensing if-else statement to one line)
if x:, vs if x == True, vs if x is True
Apologies if this has been asked before, but I have searched in vain for an answer to my exact question. Basically, with Python 2.7, I have a program running a series of geoprocessing tools, depended on what is reqested via a series of True/False variables that the user adjusts in the script e.g.