Added solution for 392_is_subsequence (qiyuangong#62)

* Added solution for 392_is_subsequence
* Fixed the code style

Co-authored-by: Shekhar-Inochi <[email protected]>

Author: shekhuverma

python/392_Is_Subsequence.py

@@ -0,0 +1,11 @@
+class Solution:
+    def isSubsequence(self, s: str, t: str) -> bool:
+        for a in s:
+            if a in t:
+                for b in range(0, len(t)):
+                    if a==t[b]:
+                        t=t[b+1:]
+                        break
+            else:
+                return(False)
+        return(True)