Python基础-1 从一行代码开始运行Python程序

print('Hello, world!')

Hello, world!

name = input('What is your name?\n')
print ('Hi, %s.' % name)

friends = ['john', 'pat', 'gary', 'michael']
for i, name in enumerate(friends):
    print(f"friend {i} is {name}")

friend 0 is john
friend 1 is pat
friend 2 is gary
friend 3 is michael

parents, babies = (1, 1)
while babies < 100:
    print(f'This generation has {babies} babies')
    parents, babies = (babies, parents + babies)

This generation has 1 babies
This generation has 2 babies
This generation has 3 babies
This generation has 5 babies
This generation has 8 babies
This generation has 13 babies
This generation has 21 babies
This generation has 34 babies
This generation has 55 babies
This generation has 89 babies

def greet(name):
    print('Hello', name)
greet('Jack')
greet('Jill')
greet('Bob')

Hello Jack
Hello Jill
Hello Bob

import re
for test_string in ['555-1212', 'ILL-EGAL']:
    if re.match(r'^\d{3}-\d{4}$', test_string):
        print(test_string, 'is a valid US local phone number')
    else:
        print(test_string, 'rejected')

555-1212 is a valid US local phone number
ILL-EGAL rejected

prices = {'apple': 0.40, 'banana': 0.50}
my_purchase = {
    'apple': 1,
    'banana': 6}
grocery_bill = sum(prices[fruit] * my_purchase[fruit]
                   for fruit in my_purchase)
print(f'I owe the grocer {grocery_bill:.2f}$')

I owe the grocer 3.40$

# This program adds up integers that have been passed as arguments in the command line
import sys
try:
    total = sum(int(arg) for arg in sys.argv[1:])
    print ('sum =', total)
except ValueError:
    print ('Please supply integer arguments')

 python test.py 1 2 3 4

# indent your Python code to put into an email
import glob

# glob supports Unix style pathname extensions
python_files = glob.glob('*.py')
for file_name in sorted(python_files):
    print('    ------' + file_name)
    with open(file_name) as f:
        for line in f:
            print('    ' + line.rstrip())
    print()

from time import localtime

activities = {8: 'Sleeping',
              9: 'Commuting',
              17: 'Working',
              18: 'Commuting',
              20: 'Eating',
              22: 'Resting' }
time_now = localtime()
hour = time_now.tm_hour

for activity_time in sorted(activities.keys()):
    if hour < activity_time:
        print (activities[activity_time])
        break
else:
    print ('Unknown, AFK or sleeping!')

Working

REFRAIN = '''
%d bottles of beer on the wall,
%d bottles of beer,
take one down, pass it around,
%d bottles of beer on the wall!
'''
bottles_of_beer = 9
while bottles_of_beer > 1:
    print(REFRAIN % (bottles_of_beer, bottles_of_beer,
                     bottles_of_beer - 1))
    bottles_of_beer -= 1

class BankAccount(object):
    def __init__(self, initial_balance=0):
        self.balance = initial_balance
    def deposit(self, amount):
        self.balance += amount
    def withdraw(self, amount):
        self.balance -= amount
    def overdrawn(self):
        return self.balance < 0
my_account = BankAccount(15)
my_account.withdraw(50)
print (my_account.balance, my_account.overdrawn())

-35 True

import unittest
def median(pool):
    copy = sorted(pool)
    size = len(copy)
    if size % 2 == 1:
        return copy[int((size - 1) / 2)]
    else:
        return (copy[int(size/2 - 1)] + copy[int(size/2)]) / 2
class TestMedian(unittest.TestCase):
    def testMedian(self):
        self.assertEqual(median([2, 9, 9, 7, 9, 2, 4, 5, 8]), 7)
if __name__ == '__main__':
    unittest.main()

D:/PY_TEST/pythonProject/test.py
Testing started at 10:49 ...
Launching unittests with arguments python -m unittest D:/PY_TEST/pythonProject/test.py in D:\PY_TEST\pythonProject



Ran 1 test in 0.002s

OK

def median(pool):
    '''Statistical median to demonstrate doctest.
    >>> median([2, 9, 9, 7, 9, 2, 4, 5, 8])
    6 #change to 7 in order to pass the test
    '''
    copy = sorted(pool)
    size = len(copy)
    if size % 2 == 1:
        return copy[int((size - 1) / 2)]
    else:
        return (copy[int(size/2 - 1)] + copy[int(size/2)]) / 2
if __name__ == '__main__':
    import doctest
    doctest.testmod()

Failure
<Click to see difference>

**********************************************************************
File "D:\PY_TEST/pythonProject\test.py", line 3, in test.median
Failed example:
    median([2, 9, 9, 7, 9, 2, 4, 5, 8])
Expected:
    6 #change to 7 in order to pass the test
Got:
    7

def median(pool):
    '''Statistical median to demonstrate doctest.
    >>> median([2, 9, 9, 7, 9, 2, 4, 5, 8])
    7
    '''
    copy = sorted(pool)
    size = len(copy)
    if size % 2 == 1:
        return copy[int((size - 1) / 2)]
    else:
        return (copy[int(size/2 - 1)] + copy[int(size/2)]) / 2
if __name__ == '__main__':
    import doctest
    doctest.testmod()

Testing started at 10:57 ...






Process finished with exit code 0