python find array in list
Arrays are usually referred to as lists. For convience, lets call them arrays in this article. Python has a method to search for an element in an array, known as ... ,Assuming you mean "list" where you say "array", you can do if item in my_list: # whatever. ,All the answers work but they always traverse the whole list. If I understand your question, you only need the first match. So you don't have to consider the rest of ... ,An index call checks every element of the list in order, until it finds a match. ..... item_index = np.where(np_array==item) print item_index # Out: (array([0, 2, 6], ... ,Your last error message indicates that you are still mixing lists and arrays. I'll try to recreate the situation: Make a list of lists. Finding a sublist works just fine: ,You're always going to have a loop - someone might come along with a clever one-liner that hides the loop within a call to map() or similar, but it's always going ... ,As for your first question: that code is perfectly fine and should work if item equals one of the elements inside myList . Maybe you try to find a string that does not ... ,Have you thought about using Python list's .index(value) method? It return the index in the list of where the first instance of the value passed in is found. ,One possible solution is converting to a list. vectors = np.array([[1, 2, 3], [4, 5, 6], [7,8,9], [10,11,12]], np.int32) print vectors.tolist().index([1,2,3]). This will return ... ,The best way is probably to use the list method .index. ... From Dive Into Python: ... assuming you want to find a value in a numpy array, I guess something like ...
| 相關軟體 Python 資訊 | |
|---|---|
 python find array in list 相關參考資料
Array find – Python Tutorial - Pythonspot
Arrays are usually referred to as lists. For convience, lets call them arrays in this article. Python has a method to search for an element in an array, known as ... https://pythonspot.com Check if item is in an array list - Stack Overflow
Assuming you mean "list" where you say "array", you can do if item in my_list: # whatever. https://stackoverflow.com Finding a substring within a list in Python - Stack Overflow
All the answers work but they always traverse the whole list. If I understand your question, you only need the first match. So you don't have to consider the rest of ... https://stackoverflow.com Finding the index of an item given a list containing it in Python ...
An index call checks every element of the list in order, until it finds a match. ..... item_index = np.where(np_array==item) print item_index # Out: (array([0, 2, 6], ... https://stackoverflow.com python finding index of an array within a list - Stack Overflow
Your last error message indicates that you are still mixing lists and arrays. I'll try to recreate the situation: Make a list of lists. Finding a sublist works just fine: https://stackoverflow.com Python search in lists of lists - Stack Overflow
You're always going to have a loop - someone might come along with a clever one-liner that hides the loop within a call to map() or similar, but it's always going ... https://stackoverflow.com Python: Find in list - Stack Overflow
As for your first question: that code is perfectly fine and should work if item equals one of the elements inside myList . Maybe you try to find a string that does not ... https://stackoverflow.com Python: find position of element in array - Stack Overflow
Have you thought about using Python list's .index(value) method? It return the index in the list of where the first instance of the value passed in is found. https://stackoverflow.com Python: Finding a numpy array in a list of numpy arrays - Stack ...
One possible solution is converting to a list. vectors = np.array([[1, 2, 3], [4, 5, 6], [7,8,9], [10,11,12]], np.int32) print vectors.tolist().index([1,2,3]). This will return ... https://stackoverflow.com Python: finding an element in a list - Stack Overflow
The best way is probably to use the list method .index. ... From Dive Into Python: ... assuming you want to find a value in a numpy array, I guess something like ... https://stackoverflow.com |