我正在使用Python打开文本文档:
text_file = open("Output.txt", "w")
text_file.write("Purchase Amount: " 'TotalAmount')
text_file.close()
我想将字符串变量TotalAmount的值替换为文本文档。有人能告诉我怎么做吗?
我正在使用Python打开文本文档:
text_file = open("Output.txt", "w")
text_file.write("Purchase Amount: " 'TotalAmount')
text_file.close()
我想将字符串变量TotalAmount的值替换为文本文档。有人能告诉我怎么做吗?
当前回答
强烈建议使用上下文管理器。作为一个优点,它可以确保文件始终关闭,无论发生什么:
with open("Output.txt", "w") as text_file:
text_file.write("Purchase Amount: %s" % TotalAmount)
这是显式版本(但请记住,应首选上面的上下文管理器版本):
text_file = open("Output.txt", "w")
text_file.write("Purchase Amount: %s" % TotalAmount)
text_file.close()
如果您使用的是Python2.6或更高版本,最好使用str.format()
with open("Output.txt", "w") as text_file:
text_file.write("Purchase Amount: {0}".format(TotalAmount))
对于python2.7及更高版本,您可以使用{}而不是{0}
在Python3中,打印函数有一个可选的文件参数
with open("Output.txt", "w") as text_file:
print("Purchase Amount: {}".format(TotalAmount), file=text_file)
Python3.6引入了f字符串作为另一种选择
with open("Output.txt", "w") as text_file:
print(f"Purchase Amount: {TotalAmount}", file=text_file)
其他回答
如果您需要将长HTML字符串拆分为较小的字符串,并将它们添加到由新行分隔的.txt文件中,请使用下面的python3脚本。在我的例子中,我从服务器向客户端发送一个非常长的HTML字符串,我需要一个接一个地发送小字符串。如果您有特殊字符,例如水平条或表情符号,也要小心UnicodeError,您需要事先用其他字符替换它们。还要确保将html中的“”替换为“”
#decide the character number for every division
divideEvery = 100
myHtmlString = "<!DOCTYPE html><html lang='en'><title>W3.CSS Template</title><meta charset='UTF-8'><meta name='viewport' content='width=device-width, initial-scale=1'><link rel='stylesheet' href='https://www.w3schools.com/w3css/4/w3.css'><link rel='stylesheet' href='https://fonts.googleapis.com/css?family=Lato'><link rel='stylesheet' href='https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css'><style>body {font-family: 'Lato', sans-serif}.mySlides {display: none}</style><body></body></html>"
myLength = len(myHtmlString)
division = myLength/divideEvery
print("number of divisions")
print(division)
carry = myLength%divideEvery
print("characters in the last piece of string")
print(carry)
f = open("result.txt","w+")
f.write("Below the string splitted \r\n")
f.close()
x=myHtmlString
n=divideEvery
myArray=[]
for i in range(0,len(x),n):
myArray.append(x[i:i+n])
#print(myArray)
for item in myArray:
f = open('result.txt', 'a')
f.write('server.sendContent(\"'+item+'\");' '\n'+ '\n')
f.close()
使用f-string是一个很好的选择,因为我们可以使用str、,
例如:
import datetime
now = datetime.datetime.now()
price = 1200
currency = "INR"
with open("D:\\log.txt","a") as f:
f.write(f'Product sold at {currency} {price } on {str(now)}\n')
使用pathlib模块,不需要缩进。
import pathlib
pathlib.Path("output.txt").write_text("Purchase Amount: {}" .format(TotalAmount))
从python 3.6开始,f-string是可用的。
pathlib.Path("output.txt").write_text(f"Purchase Amount: {TotalAmount}")
如果您使用numpy,只需一行即可将单个(或多个)字符串打印到文件中:
numpy.savetxt('Output.txt', ["Purchase Amount: %s" % TotalAmount], fmt='%s')
如果您正在使用Python3。
则可以使用打印功能:
your_data = {"Purchase Amount": 'TotalAmount'}
print(your_data, file=open('D:\log.txt', 'w'))
对于蟒蛇2
这是Python将字符串打印到文本文件的示例
def my_func():
"""
this function return some value
:return:
"""
return 25.256
def write_file(data):
"""
this function write data to file
:param data:
:return:
"""
file_name = r'D:\log.txt'
with open(file_name, 'w') as x_file:
x_file.write('{} TotalAmount'.format(data))
def run():
data = my_func()
write_file(data)
run()