NameError: name 'CreateSparkContext' is not defined

if __name__ == "__main__":
    print("RunDecisionTreeBinary")
    sc = CreateSparkContext()

def CreateSparkContext():
    sparkConf = SparkConf()                                                       \
                         .setAppName("RunDecisionTreeBinary")                         \
                         .set("spark.ui.showConsoleProgress", "false") 
    sc = SparkContext(conf = sparkConf)
    print ("master="+sc.master)    
    SetLogger(sc)
    SetPath(sc)
    return (sc)

NameError: name 'CreateSparkContext' is not defined

https://blog.csdn.net/ywsydwsbn/article/details/105601833