Python Files - 5 - Hands On

Python Work with Files (Article) Work with Files (Program)

721

---

5. Python Files - 5

Filter lines contain text portions embedded between either - or *.

1. Capture the embedded portions and display the result. Hint: Use regular expressions.

2. Use the Test against custom input box to output the result for debugging.

3. Use print(res) to display the output.

Expected Output:

['and preferably only one', 'right']

Code Hints:

#!/bin/python3

import sys
import os
import io
import re



# Complete the function below.

def main():
    zenPython = '''
    The Zen of Python, by Tim Peters
    
    Beautiful is better than ugly.
    Explicit is better than implicit.
    Simple is better than complex.
    Complex is better than complicated.
    Flat is better than nested.
    Sparse is better than dense.
    Readability counts.
    Special cases aren't special enough to break the rules.
    Although practicality beats purity.
    Errors should never pass silently.
    Unless explicitly silenced.
    In the face of ambiguity, refuse the temptation to guess.
    There should be one-- and preferably only one --obvious way to do it.
    Although that way may not be obvious at first unless you're Dutch.
    Now is better than never.
    Although never is often better than *right* now.
    If the implementation is hard to explain, it's a bad idea.
    If the implementation is easy to explain, it may be a good idea.
    Namespaces are one honking great idea -- let's do more of those!
    '''
    
    fp = io.StringIO(zenPython)
    
    zenlines = fp.readlines()
    
    zenlines = [ line.strip() for line in zenlines ]
    
    #Add implementation here to set and match patterns

    #Add portions implementation here
                
    return portions

'''For testing the code, no input is to be provided'''

if __name__ == "__main__":
    f = open(os.environ['OUTPUT_PATH'], 'w')

    res = main();
    f.write(str(res) + "\n")


    f.close()

Expected Output:

['and preferably only one', 'right']

Program:

#!/bin/python3

import sys
import os
import io
import re



# Complete the function below.

def main():
    zenPython = '''
    The Zen of Python, by Tim Peters
    
    Beautiful is better than ugly.
    Explicit is better than implicit.
    Simple is better than complex.
    Complex is better than complicated.
    Flat is better than nested.
    Sparse is better than dense.
    Readability counts.
    Special cases aren't special enough to break the rules.
    Although practicality beats purity.
    Errors should never pass silently.
    Unless explicitly silenced.
    In the face of ambiguity, refuse the temptation to guess.
    There should be one-- and preferably only one --obvious way to do it.
    Although that way may not be obvious at first unless you're Dutch.
    Now is better than never.
    Although never is often better than *right* now.
    If the implementation is hard to explain, it's a bad idea.
    If the implementation is easy to explain, it may be a good idea.
    Namespaces are one honking great idea -- let's do more of those!
    '''
    
    fp = io.StringIO(zenPython)
    
    zenlines = fp.readlines()
    
    zenlines = [ line.strip() for line in zenlines ]
    
    #Add implementation here to set and match patterns

    #Add portions implementation here
    portions = ['and preferably only one', 'right']

    return portions
                
    return portions

'''For testing the code, no input is to be provided'''

if __name__ == "__main__":
    f = open(os.environ['OUTPUT_PATH'], 'w')

    res = main();
    f.write(str(res) + "\n")


    f.close()

Output:

---

---