Python 2.7 因为少写括号导致的 SyntaxError 错误

# -*- coding: utf-8 -*-

# 控制缩进tab数量
def GetTabStr(tab_num):
    tab_str = ""
    for i in xrange(0,tab_num):
                tab_str += "\t"
        return tab_str

def BuildLine(str):
    script = ""
    # 这里的 GetTabStr() 控制整体缩进列数
    script += GetTabStr(0) + str + ";\n"
    return script

def Build_SetExtFlag(flagstr,flagval):
        script = ""
        script += "SetExtFlag(" + flagstr + "," + flagval + ")"
        return script
    
if __name__ == ‘__main__‘:
    notice = ""
    roll_screen = ""
    script = ""

    if notice != "":
                script += BuildLine( GetTabStr(2) + Build_SetExtFlag("","1")
        print "roll_screen is not null string !"