python3 笨方法学python3 第26题小测笔记

ex26这个测试是对之前25题的知识点的熟悉程度作验证与巩固，作者根据ex24与ex23随机删除了一些代码制造了一些错误让我们调试修改直至能够正常运行。

    作者让我们修改文件代码如下：

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

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

script, filename = argv

txt = open(filenme)

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

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

txt_again = open(file_again)

print(txt_again_read())


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 - 
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 = 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(startpoint)
# this is an easy way to apply a list to a format string
print("We'd have {} beans, {} jars, and {} crates.".format(*formula))



people = 20
cates = 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!")


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.")

这个是我们修改完的代码：

import sys

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.")

script, filename = sys.argv
txt = open(filename)

print(f"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())

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))

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!")

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.")

最后命令行执行

python ex26.py test2022.txt
How old are you? 1
How tall are you? 2
How much do you weigh? 3
So, you're 1 old, 2 tall and 3 heavy.
Here's your file test2022.txt:
12345
54321
11111

Type the filename again:
> test2022.txt
12345
54321
11111

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 500000.0 crates.
We can also do that this way:
We'd have 500000.0 beans, 500.0 jars, and 50000.0 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.

后面的txt文件是只是我改的一个txt普通文件，可以随意调用，错误就不标注了

测试结束，继续下一题