weird exception thrown both in the web version and the local version

[rlisahuang]

If we paste the code below into the editor, either the web version or the local version:

import matplotlib.pyplot as plt
import pandas as pd
import io

csv = '''
ID,group,time,success
P1,control,18.6,1
P2,control,15.42,1
P3,control,25.55,0
P4,control,12.56,0
P5,control,8.67,1
P6,experiment,7.31,0
P7,experiment,9.66,0
P8,experiment,13.64,1
P9,experiment,14.92,1
P10,experiment,18.47,1
'''

# weird error for this line if there is nothing else after this line
b = pd.read_csv(io.StringIO(csv))

you will see some weird exception thrown for the last line. The exception differs between the web and the local versions.

However, if you add one new line after the last line,

b = pd.read_csv(io.StringIO(csv))
# insert new line here

the error disappears.

[rlisahuang]

Web version:

Local version:

It is not a Python error, because running in REPL / by pressing the Run button shows no error.

[rlisahuang]

May be related to #18 . But this one is different in a sense that you could provide extra lines at the end of the starter code file to avoid the bug.

[rlisahuang]

Update: this error does not happen when no modules are used in the last line, or when the module is numpy

[rlisahuang]

Easy fix for now: force every starter code file to have at least one extra line at the end