笨办法学Python 3 习题7

[交作业啦]
ex7.py

print("Mary had a little lamb.")
# 在已经创建的字符串上应用格式化
print("It's fleece was white as {}.".format('snow'))
print("And everywhere that Mary went.")
print("." * 10) # what'd that do?

end1 = "C"
end2 = "h"
end3 = "e"
end4 = "e"
end5 = "s"
end6 = "e"
end7 = "B"
end8 = "u"
end9 = "r"
end10 = "g"
end11 = "e"
end12 = "r"

# watch that comma at the end. try removing it to see what happens
print(end1 + end2 + end3 + end4 + end5 + end6, end=' ')
print(end7 + end8 + end9 + end10 + end11 + end12)

# removed the comma
print(end1 + end2 + end3 + end4 + end5 + end6)
print(end7 + end8 + end9 + end10 + end11 + end12)

# 用逗号能否拼接字符串会怎样
print('L','O','V','E')
print('L'+'O'+'V'+'E')

#comma后面必须是end吗？修改成其他变量名是否可以？
print("Love", end = ' ')
print("You")
print("Love", myend = ' ')
print("Me")

运行结果

PS E:\lpthw> python .\ex7.py
Mary had a little lamb.
It's fleece was white as snow.
And everywhere that Mary went.
..........
Cheese Burger
Cheese
Burger
L O V E
LOVE
Love You
Traceback (most recent call last):
  File ".\ex7.py", line 35, in <module>
    print("Love", myend = ' ')
TypeError: 'myend' is an invalid keyword argument for print()
PS E:\lpthw>

[学习心得]
1 end是print()的参数，且是一个关键字，不能被其他变量名替代
2 print()打印字符串后，默认会换行
3 print()多个字符串用’,'拼接是，中间会插入空格；用‘+’拼接，不会有空格。