pythonstuff

A. python字典添加元素时怎么判断加到了字典的哪个位置

字典对用户来说是无序的，python会基于快速检索的需求，自己对他们进行排序。
如果你非常想明白这个问题，可以去学一下数据结构里面的哈希。

B. python3 while 语句 菜鸟问题

不用到10，索引是从0开始的，0-9已经是10个单词了。所以=10的时候就要跳出循环了

C. 谁有笨办法学python习题第26章的错误代码！

def break_words(stuff):
"""This function will break up words for us."""
words = stuff.split(' ')
return words

def sort_words(words):
"""Sorts the words."""
return sorted(words)

def print_first_word(words)
"""Prints the first word after popping it off."""
word = words.poop(0)
print word

def print_last_word(words):
"""Prints the last word after popping it off."""
word = words.pop(-1
print word

def sort_sentence(sentence):
"""Takes in a full sentence and returns the sorted words."""
words = break_words(sentence)
return sort_words(words)

def print_first_and_last(sentence):
"""Prints the first and last words of the sentence."""
words = break_words(sentence)
print_first_word(words)
print_last_word(words)

def print_first_and_last_sorted(sentence):
"""Sorts the words then prints the first and last one."""
words = sort_sentence(sentence)
print_first_word(words)
print_last_word(words)

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 explantion
\n\t\twhere there is none.
"""

print "--------------"
print poem
print "--------------"

five = 10 - 2 + 3 - 5
print "This should be five: %s" % 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)

print "With a starting point of: %d" % start_point
print "We'd have %d jeans, %d jars, and %d crates." % (beans, jars, crates)

start_point = start_point / 10

print "We can also do that this way:"
print "We'd have %d beans, %d jars, and %d crabapples." % secret_formula(start_pont

sentence = "All god\tthings come to those who weight."

words = ex25.break_words(sentence)
sorted_words = ex25.sort_words(words)

print_first_word(words)
print_last_word(words)
.print_first_word(sorted_words)
print_last_word(sorted_words)
sorted_words = ex25.sort_sentence(sentence)
prin sorted_words

print_irst_and_last(sentence)

print_first_a_last_sorted(senence)

D. 关于python的for循环

ten_thing=""

print(".Let'sfixthat.")

stuff=ten_thing.split('')
more_stuff=["Day","Night","Song","Frisbee","Corn","Banana","Girl","boy"]

deftest():
	n=0
	foriinstuff:
		n=n+1
	ifn!=10:
		next_one=more_stuff.pop()
		print("Adding:",next_one)
		stuff.append(next_one)
		print(f"Thereare{len(stuff)}itemsnow.")
		returntest()
test()

非要用个for的话··我只能想到这个办法了···