from sys import argv
print("How old are you?", end=' ')
age = input()
print("How tall are you?", end=' ')
tall = input()
print("How much do you weigh?", end=' ')
weight = input()
print(f"So, you're {age} old, {tall} tall, and {weight} heavy.")
script, filename = 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 - 5
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
if people < cates:
print ("Too many cats! The world is doomed!")
if people > cates:
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.")
下面是运行的结果
python3.6 ex26.py test.txt
How old are you? 21
How tall are you? 175
How much do you weigh? 67
So, you're 21 old, 175 tall, and 67 heavy.
Here's your file test.txt:
This is a test file.
use sh copy
123 new add
add some word
Type the filename again:
> test.txt
This is a test file.
use sh copy
123 new add
add some word
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: 6
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.
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