笨办法学python3 学习笔记 习题26

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.")

from sys import argv
script, filename = argv

txt = open(filename, encoding = 'gbk', errors = 'ignore')

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

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

txt_again = open(file_again, encoding = 'gbk', errors = 'ignore')

print(txt_again.readline())


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
cates = 30
dogs = 15


txt.close()
txt_again.close()

How old are you? 10
How tall are you? 180
How much do you weigh? 50
So, you're 10 old, 180 tall and 50 heavy.
Here's your file {filename}:
T h e r e   i s   a   t e s t .


Type the filename again:
> new.txt
T h e r e   i s   a   t e s t .

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.