使用os.getenv时Python去除引号

Question

I'm having difficulty with different string arrays. Previously, there were string arrays only in properties files. Currently, the system has string arrays in properties files and set as environmental variables in the user's .bashrc file. The string arrays look like the following in both the properties and .bashrc files.

STRING_ARRAY="host1","host2","host3"

Previously, there was a simple pair of for loops that read a series of these string arrays and passed them into some function.

for k in ("STRING_ARRAY","SOME_OTHER_ARRAY"):
   globals()[k] = globals()[k].replace("\"",'').split(",")

for stringarray,otherarray in zip(STRING_ARRAY, SOME_OTHER_ARRAY):
   someFunction(stringarray,otherarray)

This worked fine. The problem arose when some of the variables were moved out of properties files that were passed into the python script and into environmental variables. It seems that when using either os.getenv("HOSTSTRINGARRAY") or os.environ["HOSTSTRINGARRAY"], the os library returns the array of strings without the accompanying quotation marks so

PROPERTIES_STRING_ARRAY="host1","host2","host3"
print PROPERTIES_STRING_ARRAY

returns

"host1","host2","host3"

whereas

ENV_VAR_STRING_ARRAY="host1","host2","host3"
print os.getenv("ENV_VAR_STRING_ARRAY")

returns

host1,host2,host3

This is a problem because I can't seem to mix and match the two types of variables as follows

for k in ("POPERTIES_STRING_ARRAY",os.getenv("ENV_VAR_OTHER_ARRAY")):
   globals()[k] = globals()[k].replace("\"",'').split(",")

for stringarray,otherarray in zip(STRING_ARRAY, os.getenv("ENV_VAR_OTHER_ARRAY")):
   someFunction(stringarray,otherarray)

So my question is, how do get os.getenv or os.environ to return a comma separated list of strings without stripping off the quotations marks enclosing the individual strings?

Answer 1

Use ' single quote to declare the string. It should work now.

ENV_VAR_STRING_ARRAY='"host1","host2","host3"'