设置 PATH 变量后蚂蚁仍然抛出错误 "cannot find python"

Question

我在 PATH 环境变量中包含了 python msi 的路径，并且在构建文件中也正确描述了 "exec"。我仍然收到错误 -

BUILD FAILED
F:\GitHub\appinventor-sources\appinventor\build.xml:16: The following error occu
rred while executing this line:
F:\GitHub\appinventor-sources\appinventor\build-common.xml:284: The following er
ror occurred while executing this line:
F:\GitHub\appinventor-sources\appinventor\blocklyeditor\build.xml:50: Execute fa
iled: java.io.IOException: Cannot run program "python" (in directory "F:\GitHub\
appinventor-sources\appinventor\blocklyeditor"): CreateProcess error=2, The syst
em cannot find the file specified
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1047)
        at java.lang.Runtime.exec(Runtime.java:617)
        at org.apache.tools.ant.taskdefs.launcher.Java13CommandLauncher.exec(Jav
a13CommandLauncher.java:58)
        at org.apache.tools.ant.taskdefs.Execute.launch(Execute.java:428)
        at org.apache.tools.ant.taskdefs.Execute.execute(Execute.java:442)
        at org.apache.tools.ant.taskdefs.ExecTask.runExecute(ExecTask.java:628)
        at org.apache.tools.ant.taskdefs.ExecTask.runExec(ExecTask.java:669)
        at org.apache.tools.ant.taskdefs.ExecTask.execute(ExecTask.java:495)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
        at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.jav
a:106)
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.Target.execute(Target.java:435)
        at org.apache.tools.ant.Target.performTasks(Target.java:456)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
        at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(Single
CheckExecutor.java:38)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
        at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:441)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
        at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.jav
a:106)
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.Target.execute(Target.java:435)
        at org.apache.tools.ant.Target.performTasks(Target.java:456)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
        at org.apache.tools.ant.helper.SingleCheckExecutor.executeTargets(Single
CheckExecutor.java:38)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
        at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:441)
        at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:606)
        at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.jav
a:106)
        at org.apache.tools.ant.Task.perform(Task.java:348)
        at org.apache.tools.ant.Target.execute(Target.java:435)
        at org.apache.tools.ant.Target.performTasks(Target.java:456)
        at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
        at org.apache.tools.ant.Project.executeTarget(Project.java:1364)
        at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExe
cutor.java:41)
        at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
        at org.apache.tools.ant.Main.runBuild(Main.java:851)
        at org.apache.tools.ant.Main.startAnt(Main.java:235)
        at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
        at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)
Caused by: java.io.IOException: CreateProcess error=2, The system cannot find th
e file specified
        at java.lang.ProcessImpl.create(Native Method)
        at java.lang.ProcessImpl.<init>(ProcessImpl.java:385)
        at java.lang.ProcessImpl.start(ProcessImpl.java:136)
        at java.lang.ProcessBuilder.start(ProcessBuilder.java:1028)
        ... 48 more

Total time: 20 seconds
F:\GitHub\appinventor-sources\appinventor [master +2 ~0 -0 !]>

我在这里错过了什么？

Answer 1

the path of the python msi in the PATH

不应该是msi的路径，应该是exe的路径。（所以你应该运行首先自己安装 msi，以便安装 python）。

$ python --version
sh.exe": python: command not found

$ PATH=$PATH:/c/Python27/

$ python --version
Python 2.7.6

设置 PATH 变量后蚂蚁仍然抛出错误 "cannot find python"

ant still throwing error "cannot find python" after setting the PATH variable

ant

python-2.7