solved 30

Author: JavaProgrammerLB

30.py

@@ -1,14 +1,21 @@
 import download_file
 import csv
+from PIL import Image
+from PIL import ImageDraw
 
 
 def main():
     url = "http://www.pythonchallenge.com/pc/ring/yankeedoodle.csv"
     file_path = "relax/yankeedoodle.csv"
+    pic_path = "relax/hint.png"
     user = "repeat"
     password = "switch"
     # first_step(url, file_path, user, password)
-    second_step(file_path)
+    floats = second_step(file_path)
+    points = third_step(floats)
+    fourth_step(points, pic_path)
+    an = fifth_step(floats)
+    sixth_step(an)
 
 
 def first_step(url, file_path, user, password):
@@ -18,8 +25,63 @@ def first_step(url, file_path, user, password):
 def second_step(file_path):
     with open(file_path, newline="") as csvfile:
         spamreader = csv.reader(csvfile, delimiter=' ', quotechar='|')
+        floats = []
         for row in spamreader:
-            print(" ".join(row))
+            for i in range(len(row)):
+                floatStr = row[i][0:-1]
+                floats.append(float(floatStr))
+        return floats
+
+
+def third_step(input):
+    points = []
+    for i in range(len(input)):
+        point = input[i] * 0x100
+        points.append(int(point))
+    return points
+
+
+def fourth_step(input, path):
+    width = 139
+    height = 53
+    im = Image.new("P", (width, height))
+    drawer = ImageDraw.Draw(im)
+    counter = 0
+    for x in range(width):
+        for y in range(height):
+            drawer.point((x, y), input[counter])
+            counter += 1
+    im.save(path)
+
+
+def fifth_step(input):
+    an = []
+    x = "0"
+    y = "0"
+    z = "0"
+    for i in range(len(input)):
+        if i % 3 == 0:
+            if len(str(input[i])) > 5:
+                x = str(input[i])[5]
+        elif i % 3 == 1:
+            if len(str(input[i])) > 5:
+                y = str(input[i])[5]
+        elif i % 3 == 2:
+            if len(str(input[i])) > 6:
+                z = str(input[i])[6]
+            an.append(int(x + y + z))
+            x = "0"
+            y = "0"
+            z = "0"
+    return an
+
+
+def sixth_step(input):
+    result = ""
+    for i in range(len(input)):
+        value = chr(input[i])
+        result += value
+    print(result)
 
 
 if __name__ == "__main__":

README.md

@@ -1,6 +1,14 @@
 # pythonchallenge
 Solve Problems in http://www.pythonchallenge.com
 
+#### 30
+result: http://www.pythonchallenge.com/pc/ring/grandpa.html
+```python
+import csv
+```
+- csv lib for handle csv tables, csv for Comma-Separated Values
+- 7367 factored result: 53 and 139
+
 #### 29
 result: http://www.pythonchallenge.com/pc/ring/yankeedoodle.html
 - do you find these unnecessary empty lines  in the source page of guido.html