Counting array elements in Python

Question

How can I count the number of elements in an array  because contrary to logic array count string  does not count all the elements in the array  it just searches for the number of occurrences of string

User · Accepted Answer

The method len   returns the number of elements in the list   Syntax   len myArray    Eg   myArray    1  2  3  len myArray    Output   3

User · Answer

Before I saw this  I thought to myself   I need to make a way to do this    for tempVar in arrayName  tempVar  1   And then I thought   There must be a simpler way to do this   and I was right   len arrayName

User · Answer

Or   myArray   len       if you want to be oopy   len myArray   is a lot easier to type

User · Answer

len is a built-in function that calls the given container object s   len   member function to get the number of elements in the object     Functions encased with double underscores are usually  special methods  implementing one of the standard interfaces in Python  container  number  etc    Special methods are used via syntactic sugar  object creation  container indexing and slicing  attribute access  built-in functions  etc     Using obj   len     wouldn t be the correct way of using the special method  but I don t see why the others were modded down so much

User · Answer

len is a built-in function that calls the given container object s   len   member function to get the number of elements in the object     Functions encased with double underscores are usually  special methods  implementing one of the standard interfaces in Python  container  number  etc    Special methods are used via syntactic sugar  object creation  container indexing and slicing  attribute access  built-in functions  etc     Using obj   len     wouldn t be the correct way of using the special method  but I don t see why the others were modded down so much

User · Answer

len is a built-in function that calls the given container object s   len   member function to get the number of elements in the object     Functions encased with double underscores are usually  special methods  implementing one of the standard interfaces in Python  container  number  etc    Special methods are used via syntactic sugar  object creation  container indexing and slicing  attribute access  built-in functions  etc     Using obj   len     wouldn t be the correct way of using the special method  but I don t see why the others were modded down so much

User · Answer

If you have a multi-dimensional array  len   might not give you the value you are looking for  For instance   import numpy as np a   np arange 10  reshape 2  5  print len a     2   This code block will return true  telling you the size of the array is 2  However  there are in fact 10 elements in this 2D array  In the case of multi-dimensional arrays  len   gives you the length of the first dimension of the array i e    import numpy as np len a     np shape a  0    To get the number of elements in a multi-dimensional array of arbitrary shape   import numpy as np size   1 for dim in np shape a   size    dim

User · Answer

Or   myArray   len       if you want to be oopy   len myArray   is a lot easier to type

User · Answer

If you have a multi-dimensional array  len   might not give you the value you are looking for  For instance   import numpy as np a   np arange 10  reshape 2  5  print len a     2   This code block will return true  telling you the size of the array is 2  However  there are in fact 10 elements in this 2D array  In the case of multi-dimensional arrays  len   gives you the length of the first dimension of the array i e    import numpy as np len a     np shape a  0    To get the number of elements in a multi-dimensional array of arbitrary shape   import numpy as np size   1 for dim in np shape a   size    dim

User · Answer

Or   myArray   len       if you want to be oopy   len myArray   is a lot easier to type

User · Answer

Or   myArray   len       if you want to be oopy   len myArray   is a lot easier to type

User · Answer

len is a built-in function that calls the given container object s   len   member function to get the number of elements in the object     Functions encased with double underscores are usually  special methods  implementing one of the standard interfaces in Python  container  number  etc    Special methods are used via syntactic sugar  object creation  container indexing and slicing  attribute access  built-in functions  etc     Using obj   len     wouldn t be the correct way of using the special method  but I don t see why the others were modded down so much

User · Answer

Before I saw this  I thought to myself   I need to make a way to do this    for tempVar in arrayName  tempVar  1   And then I thought   There must be a simpler way to do this   and I was right   len arrayName

[python] Counting array elements in Python

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