pimento[w07]$ cat all-grades.txt
89,71,63,65,91,93,81,88,95,80
82,65,77,73,95,83,71,50,90,98
98,71,62,83,67,83,77,58,83,87
75,51,90,62,86,63,73,78,64,60
pimento[w07]$ python3
Python 3.6.6 (default, Sep 12 2018, 18:26:19)
[GCC 8.0.1 20180414 (experimental) [trunk revision 259383]] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import string
>>> values = "90,71,63"
>>> values.split(",")
['90', '71', '63']
>>>
pimento[w07]$
pimento[w07]$ python3 all-averages.py
89,71,63,65,91,93,81,88,95,80

82,65,77,73,95,83,71,50,90,98

98,71,62,83,67,83,77,58,83,87

75,51,90,62,86,63,73,78,64,60

pimento[w07]$ python3 all-averages.py
89,71,63,65,91,93,81,88,95,80
82,65,77,73,95,83,71,50,90,98
98,71,62,83,67,83,77,58,83,87
75,51,90,62,86,63,73,78,64,60
pimento[w07]$ python3 all-averages.py
['89', '71', '63', '65', '91', '93', '81', '88', '95', '80']
['82', '65', '77', '73', '95', '83', '71', '50', '90', '98']
['98', '71', '62', '83', '67', '83', '77', '58', '83', '87']
['75', '51', '90', '62', '86', '63', '73', '78', '64', '60']
pimento[w07]$ python3 all-averages.py
average =  81.6
average =  78.4
average =  76.9
average =  70.2
pimento[w07]$ python3 all-averages.py
average =  81.6
average =  78.4
average =  76.9
average =  70.2
pimento[w07]$ python3 all-averages.py
average =  81.6
average =  78.4
average =  76.9
average =  70.2
pimento[w07]$ python3 all-averages.py
average =  81.6
average =  78.4
average =  76.9
average =  70.2
pimento[w07]$ cat output.txt
average = 81.6
average = 78.4
average = 76.9
average = 70.2
pimento[w07]$ python3 checkbook.py
Enter your balance: 100
Enter a choice: withdraw (w) deposit (d) quit (q) w
Enter an amount to widthdraw: 10
New balance:  90.0
Enter a choice: withdraw (w) deposit (d) quit (q) 300
Invalid input
Enter a choice: withdraw (w) deposit (d) quit (q) w
Enter an amount to widthdraw: 300
Insufficient funds!
Enter a choice: withdraw (w) deposit (d) quit (q) d
Enter an amount to deposit: 40
New balance:  130.0
Enter a choice: withdraw (w) deposit (d) quit (q) q