Fix some bugs

Author: jhpx

Bugs.txt

@@ -1,8 +1,11 @@
 # Python Challenge Solutions
 
 This repository includes solutions to the Python Challenge quizzes for practice and fun.
+
 Website: [The Python Challenge](http://www.pythonchallenge.com/) — enjoy!
 
+(There are bugs in level_13、level_17 under python 3.13 on 2025.)
+
 ### Level 0
 2 to 38 = ?
 
@@ -104,4 +107,3 @@ Floats, image, formula.
 Google the grandpa rock and find the differences between two Mandelbrot images.  
 See [Mandelbrot Set](https://en.wikipedia.org/wiki/Mandelbrot_set)
 
-(There are bugs in level_07、level_13、level_15、level_17、level_30 under python 3.13.)

README.md

@@ -19,8 +19,8 @@ def solve(url, NOTHING, MAXRANGE):
     nothing = NOTHING
     print("Following the nothing chain!")
     for i in range(int(MAXRANGE)):
-        r = requests.get(url, params={'nothing': nothing})
-        text = r.text
+        response = requests.get(url, params={'nothing': nothing})
+        text = response.text
         m = reo.search(text)
         print('{}: {}'.format(i, text))
         if m:

level_04.py

@@ -31,11 +31,13 @@ def solve(something):
             break
     box = (left, upper, right, lower)
     print("Selecting the message area: " + str(box))
-    samplesize = ((right - left + 1) // 7, 1)
-    text = im.crop(box).convert('L').resize(samplesize).tobytes().decode()
-    hidden = "".join([chr(int(x)) for x in re.findall(r'\d+', text)])
-    print("The hidden message is: {}\n".format(hidden))
-    return hidden
+    gray_im = im.crop(box).convert('L')
+    text = ''.join(chr(gray_im.getpixel((x, 0))) for x in range(left, right, 7))
+    print("The hidden message is: {}".format(text))
+    # smart guy, you made it. the next level is [105, 110, 116, 101, 103, 114, 105, 116, 121]
+    result = "".join([chr(int(x)) for x in re.findall(r'\d+', text)])
+    print("The result message is: {}\n".format(result))
+    return result
 
 
 if __name__ == "__main__":

level_07.py

@@ -10,12 +10,12 @@
 
 
 def solve(url):
-    print("Looking up Bert(Evil):", end=' ')
+    print("Looking up Bert(Evil):")
     phonebook = xmlrpc.client.ServerProxy(url)
     response = phonebook.phone('Bert')
     whom = re.findall(r'[A-Z]+', response)[0].lower()
-    print(whom)
-    print()
+    println(whom)
+
     return whom
 
 

level_13.py

@@ -28,7 +28,7 @@ def solve(year):
     print('The given date: ' + year + '/01/27')
     # 1756/01/27
 
-    wikiurl = 'http://en.wikipedia.org/wiki/January_27'
+    wikiurl = 'https://en.wikipedia.org/wiki/January_27'
     r = requests.get(wikiurl)
     text = catch(r.text, '<li><a href="/wiki/' + year + '.*?</a>(.*?)</li>')
     text = re.findall(r'<a.*?>(.+?)</a>', text)[0]

level_15.py

@@ -48,7 +48,7 @@ def solve(url):
     # the flowers are on their way
     print()
     #
-    print("Looking up Mozart's father (Leopold):", end=' ')
+    print("Looking up Mozart's father (Leopold):")
     import xmlrpc.client
 
     url2 = PREFIX_AUTH + '../phonebook.php'

level_17.py

@@ -49,7 +49,11 @@ def solve(something):
     # +str(x[i+2])[6]
 
     result = []
-    for a, b, c in perthree(text):
+    for i in range(0, len(text), 3):
+        group = text[i:i + 3]
+        if len(group) != 3:
+            break
+        a, b, c = group
         result.append(int(a[5] + b[5] + c[6]))
     message = bytes(result).decode()
     return message