Head first python cainiao Study Notes (chapter 4), python Study Notes

Head first python cainiao Study Notes (chapter 4), python Study Notes

1, p124, error: NameError: name 'print _ lol 'is not defined

To display in the file, you need to change the call of BIF print () to call the print_lol () function in the nester module in chapter 2. Therefore, you need to import the nester module.

First, modify the print_lol () function in Chapter 2 nester module and update the module.

Then call the print_lol () function in sketch. py.

1 ''' 2 modification time: 0919 3 Modification content: Change calling BIF print () to calling the print_lol () function in the nester module in Chapter 2, you need to import the nester Module 4 '''5 import nester 6 7 man = [] 8 other = [] 9 try: 10 data=open('sketch.txt ') 11 for each_line in data: 12 try: 13 (role, line_spoken) = each_line.split (':', 1) 14 line_spoken = line_spoken.strip () 15 if role = 'man': 16 Man. append (line_spoken) 17 elif role = 'otherman ': 18 Other. append (line_spoken) 19 failed t ValueError: 20 pass21 da Ta. close () 22 failed t IOError: 23 print (The datafile is missing! ') 24 25 try: 26 with open('man_data.txt', 'w') as man_file,open('other_data.txt ', 'w') as other_file: 27 print_lol (man, fh = man_file) 28 print_lol (other, fh = other_file) 29 bytes t IOError as err: 30 print ('file Error: '+ str (err ))

An error is reported:

Cause:

When calling a module function, the format is "module name. Function Name ()"

Therefore, the code is changed:

1 ''' 2 modification time: 0919 3 Modification content: Change calling BIF print () to calling the print_lol () function in the nester module in chapter 2. Import the nester Module 4. Note: when calling print_lol, add the module name, nester. print_lol () instead of directly calling print_lol (). 5 '''6 import nester 7 8 man = [] 9 other = [] 10 try: 11 dataworks open('sketch.txt ') 12 for each_line in data: 13 try: 14 (role, line_spoken) = each_line.split (':', 1) 15 line_spoken = line_spoken.strip () 16 if role = 'man': 17 Man. append (line_spoken) 18 elif role = 'other Man ': 19 other. append (line_spoken) 20 bytes t ValueError: 21 pass22 data. close () 23 bytes t IOError: 24 print ('the datafile is missing! ') 25 26 try: 27 with open('man_data.txt', 'w') as man_file,open('other_data.txt ', 'w') as other_file: 28 nester. print_lol (man, fh = man_file) 29 nester. print_lol (other, fh = other_file) 30 bytes t IOError as err: 31 print ('file Error: '+ str (err ))