从Python脚本运行trueaccord.scalapb TypeError时出错

Question

我试图在https://github.com/aegnor/scalapb-maven-example中运行这个示例，除非我做了一些更改，否则pom.xml不会为我运行：

        <dependency>
        <groupId>com.trueaccord.scalapb</groupId>
        <artifactId>scalapbc_2.11</artifactId>
        <version>0.6.6</version>
    </dependency>
</dependencies>
<build>
    <plugins>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>exec-maven-plugin</artifactId>
            <version>1.6.0</version>
            <executions>
                <execution>
                    <!-- Generating Scala code on Windows requires Python 2.x to be installed on your system. -->
                    <id>generate-scala-protobuf-classes</id>
                    <goals>
                        <goal>java</goal>
                    </goals>
                    <phase>generate-sources</phase>
                </execution>
            </executions>
            <configuration>
                <mainClass>com.trueaccord.scalapb.ScalaPBC</mainClass>
                <includeProjectDependencies>true</includeProjectDependencies>
                <includePluginDependencies>false</includePluginDependencies>
                <classpathScope>compile</classpathScope>
                <executableDependency>
                    <groupId>com.trueaccord.scalapb</groupId>
                    <artifactId>scalapbc_2.11</artifactId>
                </executableDependency>
                <arguments>
                    <argument>--proto_path=${project.basedir}/src/main/proto</argument>
                    <argument>--scala_out=${project.build.directory}/generated-sources/proto</argument>
                    <argument>${project.basedir}/src/main/proto/*.proto</argument>
                </arguments>
            </configuration>
        </plugin>

我所做的是添加com.trueaccord.scalapb依赖项，并在它实际运行之后将其设置为true includeProjectDependencies。然而，现在我收到一个错误，上面写着：

  Traceback (most recent call last):
  File "C:\Users\JoseO\AppData\Local\Temp\protocbridge1191463098726442484.py", line 6, 
  in <module>
  s.sendall(content)
  TypeError: a bytes-like object is required, not 'str'
  --scala_out: protoc-gen-scala: Plugin failed with status code 1.

现在我从插件中捕获生成的代码。有两个文件被生成来执行命令：

protoc-jar: executing: [C:\Users\user\AppData\Local\Temp\protocjar3115202540073112270\bin\protoc.exe, --plugin=protoc-gen-scala=C:\Users\user\AppData\Local\Temp\protocbridge875241605176874095.bat, --proto_path=C:\dev\examples\scalapb-maven-example/src/main/proto, --scala_out=C:\dev\examples\scalapb-maven-example\target/generated-sources/proto, C:\dev\examples\scalapb-maven-example/src/main/proto/*.proto]

第一个文件是一个批处理文件：

@echo off
python.exe -u C:\Users\user\AppData\Local\Temp\protocbridge8364859980217271731.py 60354

第二个文件是phyton文件，这是错误发生的地方。

    import sys, socket
content = sys.stdin.read()
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('127.0.0.1', int(sys.argv[1])))
s.sendall(content)
s.shutdown(socket.SHUT_WR)
while 1:
    data = s.recv(1024)
    if data == '':
        break
    sys.stdout.write(data)
s.close()

谁能告诉我怎么回事吗？

Answer 1

这里的问题是插件com.trueaccord.scalapb:scalapbc_2.11:0.6.6使用Python 2，而我已经安装了Python 3。