Question

我已将字符串存储在变量中。我想将它附加到文本文件中。我怎样才能做到这一点？

 def readyaml(abs_read_path,):
        with open(abs_read_path, 'r') as stream, open("instanceinput.txt",'w') as fnew: 
            try:
                content = yaml.load(stream)
                instance = content['instance']
                dump = instance[0]
                print dump
                fnew.write(dump)
            except yaml.YAMLError as exc:
                print(exc)
        stream.close()
        fnew.close()

    readyaml(abs_read_path)

Answer 1

使用a代替w：

 with open(abs_read_path, 'r') as stream, open("instanceinput.txt",'a') as fnew:

Answer 2

您需要使用追加方法 Vikas＆amp; Mayur提到了，并且当写入文件时将其转换为sting对象：

示例：

def readyaml(abs_read_path,):
        with open(abs_read_path, 'r') as stream, open("instanceinput.txt",'a') as fnew:
            try:
                content = yaml.load(stream)
                instance = content['instance']
                dump = instance[0]
                print dump
                fnew.write(str(dump))  # CONVERT TO STRING OBJECT
            except yaml.YAMLError as exc:
                print(exc)
        stream.close()
        fnew.close()

    readyaml(abs_read_path)

Answer 3

您可以使用'a'或'a+'代替'w'

'a'如果文件不存在，则创建该文件。打开写入并附加数据。

'a+'如果文件不存在，则创建该文件。打开读取和写入，并在写入时附加数据。

如何使用python 2.7通过变量在文本文件中写入

3 个答案: