Write long list to file all on one line

Question

In Python the following code:

data = [np.array([[1,2,3],[4,5,6]]),[7]]
with open('A:\\examplefile.txt', 'w', newline='') as file:
      file.write(str([item for item in data]))

writes the nested list to multiple lines in the file, thus:

[array([[1, 2, 3],
       [4, 5, 6]]), [7]]

How might I write the entire list onto on line in the file? e.g.:

[array([[1,2,3],[4,5,6]]),[7]]

Answer 1

Numpy formats ndarray output by using '\n' and whitespaces such that it is readable in form of a matrix. So replacing '\n' and whitespace will do the trick.

Try this,

data = [np.array([[1,2,3],[4,5,6]]),[7]]
with open('A:\\examplefile.txt', 'w', newline='') as file:
    file.write(str(data).replace('\n','').replace(' ',''))