Python全域變數與局部變數詳解

Python全域變數與局部變數詳解

#Python中的變數：全域變數和局部變數  #在很多語言中，在聲明全域變數的時候，都喜歡把全域變數的名稱定義為大寫  #定義學生人數為100STUDENT_NUMBER = 100#學校名稱SCHOOL_NAME = 'Guangzhou University'  """\    擷取全域變數：學生人數STUDENT_NUMBER的值"""def getStudentNumber():    return STUDENT_NUMBER"""\    重設全域變數：學生人數STUDENT_NUMBER值"""def setStudentNumber(num):    global STUDENT_NUMBER    STUDENT_NUMBER = num"""\    擷取全域變數：學校名稱SCHOOL_NAME的值"""def getSchoolName():    return SCHOOL_NAME"""\    重設全域變數：學校名稱SCHOOL_NAME值"""def setSchoolName(name):    global SCHOOL_NAME    SCHOOL_NAME = name  def changeValue():    name = '北京大學'    number = 90    print('全域變數STUDENT_NUMBER = ' , getStudentNumber())    print('全域變數SCHOOL_NAME = ' , getSchoolName())    print('#######################################')    print('局部變數namber = ' , number)    print('局部變數name = ' , name)    print('#######################################')    print('改變全域變數值...')    print('#######################################')    setStudentNumber(number)    setSchoolName(name)    print('全域變數STUDENT_NUMBER = ' , getStudentNumber())    print('全域變數SCHOOL_NAME = ' , getSchoolName())  if __name__ == '__main__':    changeValue()

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