Python first, the first applet, judge the phone number, and the python Applet

Python first, the first applet, judge the phone number, and the python Applet

• General steps for coding
  • Define Requirements
  • Understanding requirements
  • Summarize the problem
  • Write code
  • Test and debug code
• Requirement
  • Enter a string 'Call me at 415-555-1011 tomorrow. 415-555-9999 is my office .'
  • Extract the phone number (415-555-1011,415-555-9999)
• Determine the format of the phone number. Consider the rule that only numbers and '-' are allowed, and the third and seventh digits must be '-', in this case, data-driven writing is considered;
• The Code is as follows:
  

  1 # coding: UTF-8 2 #__ author _ = 'diva '3 4 PHONE_NUMBER_SIZE = 12 # define the global variable. The length of the phone number is 5 6 def is_digital (ch ): # determine if it is a number 7 if ord (ch)> = ord ('0') and ord (ch) <= ord ('9 '): 8 return True 9 return False10 11 def is_special (ch): # determine whether it is '-'12 if ord (ch) = ord ('-'): 13 return True14 return False15 16 def is_phone_number_check (chars): # judge the format 17 if len (chars )! = PHONE_NUMBER_SIZE: 18 return False19 20 for I in range (PHONE_NUMBER_SIZE): 21 if not is_digital (chars [I]) and not is_special (chars [I]): # exit 22 instead of a number or '-' return False23 if (I = 3 or I = 7) and not is_special (chars [I]): # exit 24 return False25 if (I! = 3 and I! = 7) and not is_digital (chars [I]): # exclude the third and seventh digits. If it is not a number, exit 26 return False27 return True28 29 def split_phone_number (message): # filter out the number, 30 for n in range (len (message): 31 chars = message [n: n + PHONE_NUMBER_SIZE] 32 if is_phone_number_check (chars ): 33 print ('found phone number: '+ chars) 34 print ('done. ') 35 36 if _ name _ =' _ main _ ': 37 message = 'Call me at 415-555-1011 tomorrow. 415-555-9999 is my office. '38 split_phone_number (message)
  
  # It is best that you do not need to do anything. You just need to pass the parameter in. The function originally has the function of hiding the implementation: you only need to pass the message in the main function to know the result.

• Test Results

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