模块引用的四种方法:
1 相同目录
2 sys.path.append来添加
3 环境变量的pythonpath指定路径,必须重启cmd
4 在python安装路径下的site-packages的目录下添加
习题1:
写一个包,里面实现一个模块,模块里面有个类,有两个实例方法,一个方法可以统计一个路径文件的英文个数,一个是统计空白字符个数。
再实现一下调用类的逻辑
思路:新建一个目录:count
下面新建一个文件__init__.py
sting_count.py
class Count(object):
def __init__(self,file_path):
self.file_path = file_path
def count_letter_num(self):
letter_num = 0
try:
with open(self.file_path) as fp:
for line in fp:
for letter in line:
if (letter >="a" and letter <="z") or \
(letter >="A" and letter <="Z"):
letter_num+=1
return letter_num
except IOError as e:
print(e)
return None
def count_space_num(self):
space_num = 0
try:
with open(self.file_path) as fp:
for line in fp:
for letter in line:
if letter.isspace():
space_num+=1
return space_num
except IOError as e:
print(e)
return None
调用包的程序:
import count.string_count
f = count.string_count.Count("f:\\b.py")
print(f.count_letter_num())
print(f.count_space_num())
习题2:
统计一下两个句子中不重复单词数量,并列出哪些单词出现了重复值。
import string
s1 = "I am a boy,good boy!"
s2 = "I am not a boy,good girl!"
for i in string.punctuation:
s1 = s1.replace(i," ")
s2 = s2.replace(i," ")
word_list1 = set(s1.split())
word_list2 = set(s2.split())
#print(len(list(word_list1^word_list2))) 方法1
result1 = word_list1 - word_list2
result2 = word_list2 - word_list1
result = len(list(result1|result2))
print(result)