Table of Contents Solving ForkingPickler(file, protocol).dump(obj) TypeError: cant pickle Environment objects Error background Solution Summarize Solve ForkingPickler(file, protocol).dump(obj) TypeError: cant pickle Environment objects In Python parallel programming, if you need to transfer objects between multiple processes, you often use the pickle module to serialize and deserialize objects. However, sometimes when using pickle for serialization, you […]
Tag: peer
Solving TypeError in Python: object of type zip has no len()
Table of Contents Solving TypeError: object of type ‘zip’ has no len() in Python Cause Analysis Solution Example code: Merge two lists and calculate the length of the merged list Solve TypeError in Python: object of type ‘zip’ has no len() When we use the ??len()?? function in Python to obtain the length of an […]
Solving TypeError: map() got an unexpected keyword argument num_threads
Table of Contents Solving TypeError: map() got an unexpected keyword argument ‘num_threads’ wrong reason solution 1. Check Python version 2. Check the parallel processing library 3. Manually map functions Summarize Solving TypeError: map() got an unexpected keyword argument ‘num_threads’ In Python, the map() function is a commonly used built-in function that applies a function to […]
Solving TypeError: sequence item 0: expected str instance, bytes found
Table of Contents Solving TypeError: sequence item 0: expected str instance, bytes found introduction wrong reason Solution Method 1: Use the decode() function Method 2: Use str() function Method 3: Use string prefix b in conclusion Practical application scenarios Solution Summarize Solving TypeError: sequence item 0: expected str instance, bytes found Introduction During the Python […]
Successfully resolved TypeError: Object of type ndarray is not JSON serializable
Table of Contents Successfully resolved TypeError: Object of type ‘ndarray’ is not JSON serializable wrong reason solution 1. Use tolist() method 2. Use the astype() method 3. Use custom Encoder in conclusion Sample code 1. Use tolist() method 2. Use the astype() method 3. Use custom Encoder Successfully resolved TypeError: Object of type ‘ndarray’ is […]
Solving TypeError: encoding’ is an invalid keyword argument for this function
Table of Contents Solving TypeError: ‘encoding’ is an invalid keyword argument for this function wrong reason Solution 1. Check Python version 2. Use the right functions 3. Check function parameters 4. Check file opening mode Sample code Summarize Practical application scenarios Sample code grammar open mode return value Usage example Solving TypeError: ‘encoding’ is an […]
Solve TypeError: type numpy.ndarray doesnt define round method
Table of Contents Solving TypeError: type numpy.ndarray doesn’t define round method wrong reason Solution round() function in Python multidimensional array object round() function and multidimensional array objects Solving TypeError: type numpy.ndarray doesn’t define round method When using Python for scientific computing and data analysis, the NumPy library is often used. NumPy is a powerful numerical […]
org.apache.catalina.connector.ClientAbortException: java.io.IOException: Connection reset by peer
//Error log org.apache.catalina.connector.ClientAbortException: java.io.IOException: Connection reset by peer at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:351) at org.apache.catalina.connector.OutputBuffer.flushByteBuffer(OutputBuffer.java:776) at org.apache.catalina.connector.OutputBuffer.append(OutputBuffer.java:681) at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:386) at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:364) at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:96) at com.fasterxml.jackson.core.json.UTF8JsonGenerator._flushBuffer(UTF8JsonGenerator.java:2159) at com.fasterxml.jackson.core.json.UTF8JsonGenerator._writeStringSegments(UTF8JsonGenerator.java:1302) at com.fasterxml.jackson.core.json.UTF8JsonGenerator.writeString(UTF8JsonGenerator.java:502) at com.fasterxml.jackson.databind.ser.std.StringSerializer.serialize(StringSerializer.java:41) at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider._serialize(DefaultSerializerProvider.java:480) at com.fasterxml.jackson.databind.ser.DefaultSerializerProvider.serializeValue(DefaultSerializerProvider.java:319) at com.fasterxml.jackson.databind.ObjectWriter$Prefetch.serialize(ObjectWriter.java:1516) at com.fasterxml.jackson.databind.ObjectWriter.writeValue(ObjectWriter.java:1006) at org.springframework.http.converter.json.AbstractJackson2HttpMessageConverter.writeInternal(AbstractJackson2HttpMessageConverter.java:343) at org.springframework.http.converter.AbstractGenericHttpMessageConverter.write(AbstractGenericHttpMessageConverter.java:104) at org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:277) at org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor.java:181) at org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:82) at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:123) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878) at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792) at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) at […]
Solving TypeError: unsupported operand type(s) for +: dict_items and list
Table of Contents Solving TypeError: unsupported operand type(s) for + : ‘dict_items’ and ‘list’ wrong reason solution Method 1: Convert dictionary view to list Method 2: Use the extend() method Method 3: Use list parsing Summarize Solving TypeError: unsupported operand type(s) for + : ‘dict_items’ and ‘list’ In Python programming, we often encounter various errors. […]
Solving TypeError: int object is not iterable
Table of Contents Solving TypeError: ‘int’ object is not iterable wrong reason Solution 1. Use the range function 2. Convert integer object to iterable object 3. Check code logic Summarize Characteristics of integer objects Creation of integer objects Use of integer objects Solving TypeError: ‘int’ object is not iterable In the process of Python programming, […]