Complete task 4

TaskB04/solution.py

@@ -0,0 +1,28 @@
+import sys
+import re
+
+def solve(lines):
+    # filter all substrings that match
+    # print
+    # print(None, re.findall(r"\b\d+\b", lines[3]))
+    # return []
+    p = re.compile(r"\b\d+\b")
+    res = []
+    for l in lines:
+        m = re.findall(p, l)
+        if m:
+            res.append(' '.join(m) + '\n')
+    return res
+
+if __name__ == "__main__":
+    lines = []
+    
+    fp = sys.argv[1]
+    assert("polish_wiki_excerpt" in fp)
+
+    print(fp)
+    with open(fp, encoding="utf-8") as f:
+        lines = f.readlines()
+    sol = solve(lines)
+    with open("./polish_wiki_excerpt.out", 'w', encoding="utf-8") as f:
+        f.writelines(sol)