習題26 - 恭喜你, 現在可以考試了

這次是測試練習,
把檔案下載下來後, 將之訂正.
原本的檔案在
https://learnpythonthehardway.org/python3/exercise26.txt

下載下來後, 改名為exe26.py
開始訂正它,
我附上中文注釋,方便好找出這題是在哪個練習.

#ex11
print("How old are you?", end=' ')
age = input()
print("How tall are you?", end=' ')
height = input()
print("How much do you weigh?", end=' ')
weight = input()

print(f"So, you're {age} old, {height} tall and {weight} heavy.")

#ex15
from sys import argv
script, filename = argv

txt = open(filename)

print("Here's your file {filename}:")
print(txt.read())

print("Type the filename again:")
file_again = input("> ")

txt_again = open(file_again)

print(txt_again.read())


#ex24
print("Let's practice everything.")
print('You\'d need to know \'bout escapes with \\ that do \n newlines and \t tabs.')

poem = """
\tThe lovely world
with logic so firmly planted
cannot discern \n the needs of love
nor comprehend passion from intuition
and requires an explanation
\n\t\twhere there is none.
"""

print("--------------")
print(poem)
print("--------------")


five = 10 - 2 + 3 - 6
print(f"This should be five: {five}")

def secret_formula(started):
    jelly_beans = started * 500
    jars = jelly_beans / 1000
    crates = jars / 100
    return jelly_beans, jars, crates


start_point = 10000
beans, jars, crates = secret_formula(start_point)

# remember that this is another way to format a string
print("With a starting point of: {}".format(start_point))
# it's just like with an f"" string
print(f"We'd have {beans} beans, {jars} jars, and {crates} crates.")

start_point = start_point / 10

print("We can also do that this way:")
formula = secret_formula(start_point)
# this is an easy way to apply a list to a format string
print("We'd have {} beans, {} jars, and {} crates.".format(*formula))


#以下是並沒有在之前的練習學過,但是很簡單的數學
people = 20
cats = 30
dogs = 15


if people < cats:
    print ("Too many cats! The world is doomed!")

if people > cats:
    print("Not many cats! The world is saved!")

if people < dogs:
    print("The world is drooled on!")

if people > dogs:
    print("The world is dry!")


# +=,就是相加, 然後返回給前一個變量.
# dogs = dogs + 5
dogs += 5

if people >= dogs:
    print("People are greater than or equal to dogs.")

if people <= dogs:
    print("People are less than or equal to dogs.")


if people == dogs:
    print("People are dogs.")

因為這題需要一個檔案來打開,
我另外又在同一個文件夾中,放了一個ex26_sample.txt.
內容為
This is Line 1
This is Line 2
This is Line 3

然後用Windows的cmd, 執行python打開它.

C:\Windows\System32>cd C:\Users\Peter\Desktop\Python\LP3THW
C:\Users\Peter\Desktop\Python\LP3THW>python ex26.py ex26_sample.txt
How old are you? 111
How tall are you? 222
How much do you weigh? 333
So, you're 111 old, 222 tall and 333 heavy.
Here's your file {filename}:
This is Line 1
This is Line 2
This is Line 3
Type the filename again:
> ex26_sample.txt
This is Line 1
This is Line 2
This is Line 3
Let's practice everything.
You'd need to know 'bout escapes
      with \ that do
 newlines and    tabs.
--------------

        The lovely world
with logic so firmly planted
cannot discern
 the needs of love
nor comprehend passion from intuition
and requires an explanation

                where there is none.

--------------
This should be five: 5
With a starting point of: 10000
We'd have 5000000 beans, 5000.0 jars, and 50.0 crates.
We can also do that this way:
We'd have 500000.0 beans, 500.0 jars, and 5.0 crates.
Too many cats! The world is doomed!
The world is dry!
People are greater than or equal to dogs.
People are less than or equal to dogs.
People are dogs.

C:\Users\Peter\Desktop\Python\LP3THW>

完成


最初發表 / 最後更新: 2018.09.06 / 2018.09.06