[英]Open files and store contents in variable
代码:
import secrets
import sys
import time
import string
from tenacity import (retry , stop_after_attempt)
#Required Defs
var = open('conf.txt','r+')
content = var.read()
print(content)
def get_random_string(length):
letters = string.ascii_lowercase
num = string.ascii_uppercase
punc = string.punctuation
spec = string.hexdigits
one = str(num) + str(punc) + str(spec)
result_str = ''.join(secrets.choice(one) for i in range(length))
print("Random string of length", length, "is:", result_str)
#Closing All Defs Here
@retry(stop=stop_after_attempt(5))
def start():
pasw = input("Do YOu Want A Random Password: y/n: ")
if pasw == 'y':
leng = input("Please Type The Length Of The Password You Want: ")
try:
len1 = int(leng)
get_random_string(len1)
time.sleep(4)
except ValueError:
print("Only Numbers Accepted")
time.sleep(4)
elif pasw == 'n':
sys.exit("You Don't Want TO Run The Program")
time.sleep(3)
else:
raise Exception("Choose Only From 'y' or 'n'")
start()
问题:
我想读取名为conf.txt
的文件的内容,并且只想包含 2 个字符 3 个字母,它基于conf.txt
。 我怎样才能做到这一点? 请告诉conf.txt
包含:
minspec = 1 #This tells take 2 special chars chars
minnumbers = 3 #This tells take 3 Numbers
minletter = 2 #This tells take 2 lower chars
minhex = 2 #This tells take 2 hex numbers
with open('file.txt', 'r') as data:
contents = data.read()
在上面的示例中,我们使用 object 名称数据以读取模式打开 file.txt。 我们可以使用 data.read() 读取文件并将其存储在变量名内容中。 使用with
的好处之一是我们不需要关闭文件,它会自动为您关闭文件。
对于仅读取文件 object 的选定字节,可以使用:
例子:
f = open('workfile', 'rb') # b'0123456789'
f.read(2) # reading only the first two bytes(b'01')
f.seek(6) # go to the 6th byte in the file
f.read(3) # reading 3 bytes after 6 position(b'678')
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