By Zhao Kun Peng

pythonkd · pythonkd · commit 5e23c0ad5c6c · 2018-09-05T19:50:39.000+08:00
diff --git a/checkio/count.py b/checkio/count.py
@@ -0,0 +1,40 @@
+from collections import  Counter
+def checkio(text: str) -> str:
+    a = list(filter(nonum, text))
+    b = []
+    for i in a:
+        b.append(i.lower())
+    x = sorted(Counter(b).most_common(), key=lambda x: x[1], reverse=True)
+
+    def p(n):
+        if n[1] < x[0][1]:
+            return False
+        else:
+            return True
+
+    return sorted(list(filter(p, x)), key=lambda x: x[0])[0][0]
+
+
+def nonum(n):
+    if n.isdigit():
+        return False
+    if ord(n) < 65 or 90 < ord(n) < 97 or ord(n) > 122:
+        return False
+    else:
+        return True
+
+
+if __name__ == '__main__':
+    print("Example:")
+    print(checkio("Hello World!"))
+
+    # These "asserts" using only for self-checking and not necessary for auto-testing
+    assert checkio("Hello World!") == "l", "Hello test"
+    assert checkio("How do you do?") == "o", "O is most wanted"
+    assert checkio("One") == "e", "All letter only once."
+    assert checkio("Oops!") == "o", "Don't forget about lower case."
+    assert checkio("AAaooo!!!!") == "a", "Only letters."
+    assert checkio("abe") == "a", "The First."
+    print("Start the long test")
+    assert checkio("a" * 9000 + "b" * 1000) == "a", "Long."
+    print("The local tests are done.")
