fix NaN case in perChrom.py

Author: ATPs

src/perChrom.py

@@ -612,7 +612,7 @@ def translateCDSplusWithMut(r, df_mutations):
         print('frame shift, complex case, no change for', transcript_id)
         return {}
 
-    codons_alt.loc[codons_alt.duplicated('AA_index'),['codon_ref','AA_ref','AA_index']] = np.NaN # only use each AA_ref Once
+    codons_alt.loc[codons_alt.duplicated('AA_index'),['codon_ref','AA_ref','AA_index']] = np.nan # only use each AA_ref Once
     codons_alt['AA_alt'] = codons_alt.apply(lambda x:x['AA_ref'] if x['codon_alt'] == x['codon_ref'] else str(Seq(x['codon_alt']).translate()), axis=1)
     # codons_alt['AA_index'] = codons_alt['AA_index'].fillna(method='ffill')
     codons_alt['AA_index'] = codons_alt['AA_index'].ffill()