就是这个红彤彤的异常 io.UnsupportedOperation: not writable 翻译一下,意思是不支持写入的权限。
Traceback (most recent call last) <ipython-input-7-3626d6c87fee> in <module> ----> 1 f.write('abc') UnsupportedOperation --------------------------------------------------------------------------- UnsupportedOperation Traceback (most recent call last) <ipython-input-10-458819baaf89> in <module> ----> 1 f.write('acss') UnsupportedOperation Traceback (most recent call last) <ipython-input-13-571e9fb02258> in <module> ----> 1 f.read() UnsupportedOperation Traceback (most recent call last) <ipython-input-19-571e9fb02258> in <module> ----> 1 f.read() UnsupportedOperation
--------------------------------------------------------------------------- UnsupportedOperation Traceback (most recent call last) <ipython-input-71-ad0d3a1f89a7> in <module> ----> 1 f.seek(2,1) UnsupportedOperation --------------------------------------------------------------------------- UnsupportedOperation Traceback (most recent call last) <ipython-input-72-c79d1a6e2c76> in <module> ----> 1 f.seek(2,2) UnsupportedOperation
支持巨型帧的机型,调用RunInstances接口创建机器时不会报错,不支持的则会明确报错,比如 [TencentCloudSDKException] code:UnsupportedOperation.InstanceTypeNotSupportJumboFrame requestId:c362da73-71ed-4214-a255-049b1184c0a9 [TencentCloudSDKException] code:UnsupportedOperation.InstanceTypeNotSupportJumboFrame
test.txt' # file = open('text.txt', 'r') # print(file.read()) # # abcdefg # file.write('aaa') # # io.UnsupportedOperation test.txt' # file = open('text.txt','rb') # print(file.read()) # b'abcdefg' # # file.write(b'aaa') # # io.UnsupportedOperation
注意,在使用 write() 向文件中写入数据,需保证使用 open() 函数是以 r+、w、w+、a 或 a+ 的模式打开文件,否则执行 write() 函数会抛出 io.UnsupportedOperation
Traceback (most recent call last): File "test.py", line 10, in <module> f.write("hello") io.UnsupportedOperation
只写方式打开,能否读取: fpath = r'E:\workdir\test1.txt' #文件只写方式打开 f = open(fpath, 'w') #进行读取 f.read() f.close() 结果: UnsupportedOperation 3 fpath = r'E:\workdir\test1.txt' 4 f = open(fpath, 'w') ----> 5 f.read() 6 f.close() UnsupportedOperation
Traceback (most recent call last): File "test.py", line 10, in <module> f.write("hello") io.UnsupportedOperation
读取 data = f.read() print(data) 写入 f.write("我爱北京天安门") 执行报错 io.UnsupportedOperation: not writable 为什么呢? 格式必须要写在文件的后面 f = open("Yesterday.txt",'w',encoding="utf-8") data = f.read() f.write("我爱北京天安门") 执行报错 io.UnsupportedOperation
) exclusive_fp = True try: fp.seek(0) # 在此打开文件流 except (AttributeError, io.UnsupportedOperation
response['Body'].get_raw_stream() remote_file.seek(0) return File(remote_file) 不过这里一直报错“io.UnsupportedOperation
,传入的'w'换成了'r',会出现异常,因为以读的模式打开文件,不能进行写操作.运行结果为: Traceback (most recent call last): Type: <class 'io.UnsupportedOperation Value: not writable f.write('自定义上下文管理\n') TreacBack: <traceback object at 0x0000024EA5E11508> io.UnsupportedOperation
注意:在写文件时,必须标注写格式"a+","r+","wb+"等,不然无法写入,如果不修改mode,默认为"r",只读,强制写入会报错io.UnsupportedOperation: not writable
>save(Mono<RouteDefinition>route){returnMono.defer(()->Mono.error(newUnsupportedOperationException("Unsupportedoperation <Void>delete(Mono<String>routeId){returnMono.defer(()->Mono.error(newUnsupportedOperationException("Unsupportedoperation
catch (Exception exception) { const int WINCODEC_ERR_UNSUPPORTEDOPERATION switch (exception.HResult) { case WINCODEC_ERR_UNSUPPORTEDOPERATION
例: fo = open("temp.txt","r") fo.write('aaa') fo.close() 运行结果: io.UnsupportedOperation: not writable
【这是googpy的第56篇原创】 昨天文章结尾的时候,我说Python使用seek函数报错:io.UnsupportedOperation:can’t do nonzero end-relative
last): File "/home/python/Desktop/test/xxf.py", line 4, in <module> f.write("hello world") io.UnsupportedOperation
UnsupportedOperation.UnknowMethod 未知方法名。