Cannot re register id: pommeffacompetition-v0 problem solving

Problem description

stay pommerman Environment , When you expect to modify the base environment , because env The environment name has been registered in Zhongben and an error will be reported .

Cause analysis ：

• Trace the source of the error and find the following code ：
  

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Solution ：

• Comment out the above code , And add two lines of code ：

print("Remove {} from registry".format(id))  #  This trip is OK without adding 
del registry.env_specs[id]

So for the environment of repeated registration , The registered environment will be deleted first and the new environment will be registered to register in .

Reference material

Cannot re-register id: MultiagentSimple-v0 Problem solving