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edited Aug 15, 2022 at 0:38As for your first question: "if item is in my_list:" is perfectly fine and should work if item equals one of the elements inside my_list. The item must exactly match an item in the list. For instance, "abc" and "ABC" do not match. Floating point values in particular may suffer from inaccuracy. For instance, 1 - 1/3 != 2/3.
As for your second question:
3 in [1, 2, 3] # => TrueFiltering a collection
That is, finding all elements in a sequence that meet a certain condition. You can use list comprehension or generator expressions for that:
Content Under CC-BY-SA license For lists, there's also the index method that can sometimes be useful if you want to know wherea certain element is in the list: However, note that if you have duplicates, .indexalways returns the lowest index:...... If there are duplicates and you want all the indexes then you can use enumerate()instead: See more
This is the use case you describe: Checking whether something is inside a list or not. As you know, you can use the inoperator for that: See more
That is, finding all elements in a sequence that meet a certain condition. You can use list comprehension or generator expressions for that: The latter will return … See more
If you only want the first thing that matches a condition (but you don't know what it is yet), it's fine to use a for loop (possibly using the elseclause as well, which is … See more
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WEBThe best way is probably to use the list method .index. For the objects in the list, you can do something like: def __eq__(self, other): return self.Value == other.Value with any special …
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WEBFeb 24, 2022 · finding the index using the index() list method, using a for-loop, and finally, using list comprehension and the enumerate() function. Specifically, here is what we will …
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WEBMay 18, 2023 · Create a list of the ‘Course’ values in the dictionaries in the list using a list comprehension. Use the index() method to find the index of the target value in the list of …
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