Basic

strsize.py

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+#counting alpha,digit,space& symbols
+
+msg ="india @20 #311200"
+alpha,digit,space,symbol=0,0,0,0
+for ch in msg:
+    if ch.isalpha(): 
+          alpha += 1
+    elif ch.isdigit():
+	    digit +=1
+    elif ch.isspace():
+	    space += 1
+    else:
+        symbol += 1
+else:
+    print("Alpha: %d\nDigit: %d\nSpace: %d\nSymbol: %d"\
+        %(alpha,digit,space,symbol))
+    size =len(msg)
+print("size : %d" %size)
+
+if symbol >=size*0.2:
+     print("string is meaningless")
+else:
+     print("string is meaningfull")