another.txt
时间: 2023-06-21 20:23:13 浏览: 64
好的,以下是Python代码实现读取date721.txt文件内容,将其按相反的顺序写入另一个文本文件another.txt:
```python
with open('date721.txt', 'r') as f1:
lines = f1.readlines()
with open('another.txt', 'w') as f2:
for line in reversed(lines):
f2.write(line)
```
这段代码首先打开date721.txt文件,读取其中所有行并保存到lines列表中。然后打开另一个文件another.txt,并使用reversed函数将lines列表中的内容按相反的顺序逐行写入到新文件中。最后关闭两个文件。
相关问题
Write a program to read the file Harry_Potter.txt and count the number of words in this file. Then, create and write the number of words in another .txt file named 'Count_Words' (You do not have to submit the file you generate.) Download the Harry Potter.txt file.
Here is a Python program that reads the file 'Harry_Potter.txt', counts the number of words in it, and writes the count to a new file 'Count_Words.txt':
```python
# open the Harry Potter text file
with open('Harry_Potter.txt', 'r') as file:
# read the contents of the file
text = file.read()
# split the text into words
words = text.split()
# count the number of words
num_words = len(words)
# create a new file and write the number of words
with open('Count_Words.txt', 'w') as file:
file.write(str(num_words))
```
This program first opens the 'Harry_Potter.txt' file and reads its contents into a variable called `text`. It then splits the text into individual words using the `split()` method and counts the number of words using the `len()` function.
Finally, the program creates a new file called 'Count_Words.txt' using the `open()` function with the `w` (write) mode. It writes the number of words to the file using the `write()` method, converting the integer to a string using the `str()` function.
Note that you need to make sure the 'Harry_Potter.txt' file is in the same directory as the Python program for this to work.
requirements.txt怎么在项目中生成requirements.txt
在项目中生成requirements.txt文件可以帮助记录项目所依赖的第三方库及其版本信息,方便其他人在不同环境中复现项目的运行环境。以下是一种常见的方法来生成requirements.txt文件:
1. 确保你的项目使用了虚拟环境(virtual environment),这样可以隔离项目的依赖库与系统的全局库。
2. 在虚拟环境中安装项目所需的所有依赖库。可以使用pip命令来安装,例如:
```
pip install package_name
```
3. 在项目根目录下打开命令行终端,并激活虚拟环境。
4. 运行以下命令来生成requirements.txt文件:
```
pip freeze > requirements.txt
```
这个命令会将当前虚拟环境中安装的所有依赖库及其版本信息输出到requirements.txt文件中。
5. 生成的requirements.txt文件会包含类似于以下内容的信息:
```
package_name==1.0.0
another_package==2.3.4
```
每一行表示一个依赖库及其版本号。
这样,你就成功地在项目中生成了requirements.txt文件。其他人可以通过运行以下命令来安装相同的依赖库:
```
pip install -r requirements.txt
```
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