Useful methods that I am writting for myself

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def my_mask(df,column,condition,value):
    new_data = []
    if condition == "==":
        new_data = df[df[column] == value]
    elif condition == "<=":
        new_data = df[df[column] <= value]
    elif condition == "!=":
        new_data = df[df[column] != value]
    elif condition == ">=":
        new_data = df[df[column] >= value]
    elif condition == ">":
        new_data = df[df[column] > value]
    elif condition == "<":
        new_data = df[df[column] < value]
    else:
        print "arguments needed-column,condition,value-:"
    return new_data


    

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