如何在Python和/或Cloud9 IDE中抑制警告/错误？

Question

I am using the Cloud9 IDE and have created a Python project.

However, I keep getting the error in my editor on one line, which is not an error when i run it, which says:

Instance of 'dict' has no 'columns' member

How can I suppress this error, either using Python syntax or Cloud9 syntax?

NOTE: when I run the code, it does not result in an error. My IDE editor simply thinks its an error and warns me.

    xl      = pd.ExcelFile(dataFileUrl)
    sheets  = xl.sheet_names
    data    = xl.parse(sheets[0])


    # the ERROR warning is on the line for data.columns
    for ecol in expectedCols:
        if (ecol in data.columns) == False:
            return {
                'fail':   True,
                'code':   402,
                'msg':    "Incomplete data. Missing: " + ecol
            }

Answer 1

This is a known limitation of PyLint as mentioned in their documentation ..

E1101

 %s %r has no %r member \n\nFunction %r has no %r member \nVariable %r has no %r member \n.  .  .  

Used when an object (variable, function, …) is accessed for a non-existent member.

False positives: This message may report object members that are created dynamically, but exist at the time they are accessed.

Try adding the comment # pylint: disable=no-member at the top of your page (I've never played around with modifying PyLint before, so I'm note entirely sure how this system of configuring via comments works...)

Answer 2

You can use try (equivalent to try/catch or rescue/ensure in other languages)

try:
   ecol in data.columns:
except:
    #Handle differently if there is a problem or pass
    return {
            'fail':   True,
            'code':   402,
            'msg':    "Incomplete data. Missing: " + ecol
        }

Answer 3

Following the comment by @LucG, I tried to get the list of column headers in a different way.

Hence following this thread , I used

list(df) 

instead of

df.columns

This suppressed the warning.