Python3如何在另一个函数中使用一个函数中的元素

Question

I have a file which looks like this :

OG_100000: V_bacterium_v|198260291 O_bacterium_v|391222558 O_terrae_v|182414991

and i did this function :

def readGroupFile(groupFileName):
dict_gene_taxonomy = {}
fh = open(groupFileName,"r")

for line in fh:
    liste = line.split(": ")
    groupName = liste[0]
    genesAsString = liste[1]
    dict_taxon = {}
    liste_gene = genesAsString.split()

    for item in liste_gene:
        taxonomy_gene = item.split("|")
        taxonomy = taxonomy_gene[0]
        geneId   = taxonomy_gene[1]                         

        if taxonomy in dict_taxon:
            listeCorrespondantATaxonomy = dict_taxon[taxonomy]
            listeCorrespondantATaxonomy.append(geneId)
        else:
            dict_taxon[taxonomy] = []
            dict_taxon[taxonomy].append(geneId)

    dict_gene_taxonomy[groupName] = dict_taxon
fh.close()
return dict_gene_taxonomy

I did this function to make dictionaries and split element in each dictionary to be able to reach only the element after the pipe("|"), called geneId.

Then i made a function to create a Post Request on a internet database with these geneID. I'm not gonna link the whole function because it works properly when i manually add the geneId in the function's line :

data = urllib.parse.urlencode(getPost("391222558"))

considering the fact that "391222558" is one geneId from group file, but i need to replace these numbers by every "geneId" in my readGroupFile function. i can't write :

data = urllib.parse.urlencode(getPost(geneId))

because i'm calling an element in a readGroupFile which is not defined outside this function. So how can i reach all the "geneId" in my readGroupFile function to add this parameter in getPost(...) so it can work for every geneId in my group file ??

Answer 1

your problem is that you are creating only local variables , and those are deleted when the function end.
so you got couple of options:
the first one is define the geneid as a global variable , all you got to do is just:

     global geneid
     def readGroupfile():
     global geneid

you will have to define him once not in a function and then whenever you use it just write global and his name,and it will make him global variable. your secend options is to do the same with your dict , that also contain this variable. i hope i helped you.