pythonprettytable

Trouble using add_row with prettytable

I am trying to format an array using the prettytable library. Here is my code:

from prettytable import PrettyTable
arrayHR = [1,2,3,4,5,6,7,8,9,10]
print ("arrayHR:", arrayHR)
x = PrettyTable(["Heart Rate"])
for row in arrayHR:
    x.add_row(row)

This results in the following error:

arrayHR: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
    Traceback (most recent call last):
      File "C:\Users\aag\Documents\Python\test.py", line 7, in <module>
    x.add_row(row)
      File "C:\Python33\lib\site-packages\prettytable.py", line 817, in add_row
    if self._field_names and len(row) != len(self._field_names):
TypeError: object of type 'int' has no len()

What am I doing wrong?

Solution

  • According to the documentation, add_row is expecting a list, not an int, as an argument. Assuming that you want the values in arrayHR to be the first value in each row, you could do:

    x = PrettyTable(["Heart Rate"])
for row in arrayHR:
    x.add_row([row])

    or adopt the add_column example, also from the documentation:

    x = PrettyTable()
x.add_column("Heart Rate", arrayHR)