如上图所示,在使用pickle持久化写入时,发生简单错误“TypeError: write() argument must be str, not bytes”原因分析:Python3中利用pickle对数据持久化存储时,必须用二进制(b)模式读写文件。因此,需要将‘w’改为‘wb’后,方可成功写入。f=()pickle.dump(pf)至此,重新运行代码即可,问题得以解决。
pickle.dump()遇到的TypeError 报错1 可以看到,提示错误TypeError:write()argumentmustbestr,notbytes,看错误信息是说write()函数的参数必须为str,而不是字节bytes。 查看源码并解决报错1 从红色框线里的内容可以看出,我们的问题出在第48行打开文件这一步,也就是with open('./tmp.pk', 'w') as f: 这条语句...
今天使用Python中的pickle存储的时候出现了以下错误: TypeError: write() argument must be str, not bytes 网上搜索才发现原来是文件打开的方式有问题。 之前文件打开的语句是: f=open("list.pkl","w+") 然后使用二进制方式打开就没有这个问题: f=open("list_account.pkl","wb+") 产生问题的原因是因为pick...
pic.write(c)returnHttpResponse(picName) 出现TypeError: write() argument must be str, not bytes错误 网上搜索才发现原来是文件打开方式有问题,把之前的打开语句修改为用二进制方式打开就没有问题 改为: defuploadHandle(request): pic1=request.FILES['pic1'] picName=os.path.join(settings.MEDIA_ROOT,pic1...
1. 报错一:TypeError: write() argument must be str, not bytes 将决策树写入磁盘的代码如下: 1 def storeTree(inputTree, filename): 2 import pickle 3 fw = open(filename, 'w') 4 pickle.dump(inputTree, fw) 5 fw.close() 1. 2. ...
Python3.x 文件写入出现错误 TypeError: write() argument must be str, not bytes 背景 用Pycharm编辑器Python3.x语言写一个百度贴吧爬虫程序 代码如下: 在网上查资料可知,pickle存储方式默认是二进制方式,将writePage方法中代码with open(filename,"w") as f :改成二进制方式打开便可,with open(filename,"...
"TypeError: write() argument must be str, not bytes does not mean that the argument you passed was actually bytes, sys.stdout is a buffered stream with .line_buffering enabled, which means something written to the line earlier could be the bytes, not the string you just submitted. So, ...
错误原因:pickle模块存储的是二进制字节码,需要以二进制的方式进行读写1. 报错一:TypeError: write() argument must be str, not bytes将决策树写入磁盘的代码如下: 1 def storeTree(inputTree, filename): 2 import pickle 3 fw = open(filename, 'w') 4 ...
File "... python3.5/site-packages/msgpack/__init__.py", line 38, in pack stream.write(packer.pack(o)) TypeError: write() argument must be str, not bytes I also tried with different format super(MessagepackTarget, self).__init__(path=filename, format=GzipFormat) but that fails as...
(xml)但是,我不能将输出重定向到xml文件;out = open('C:/Output.xml','w')out.close()TypeError: write() argument must be str, not Nonexml.write('C:/output.xm 浏览4提问于2021-03-31得票数 0 回答已采纳 15回答 如何使用ElementTree输出CDATA 、 但是,我需要输出包含CDATA部分的XML,而使用ElementT...