Better pypy handling.

main.py

@@ -8,7 +8,29 @@ import sys
 exs = ['py', 'exe']
 sol_pattern = re.compile(r'(\d+)_.+\.(?:{})'.format('|'.join(exs)))
 
+try:
+    subprocess.run(['pypy', '--version'],
+                   stdout=subprocess.DEVNULL,
+                   stderr=subprocess.DEVNULL)
+
+    pypy_installed = True
+except FileNotFoundError:
+    print('warning : install pypy for faster solving time')
+    pypy_installed = False
+
+try:
+    subprocess.run(['pypy3', '--version'],
+                   stdout=subprocess.DEVNULL,
+                   stderr=subprocess.DEVNULL)
+
+    pypy3_installed = True
+except FileNotFoundError:
+    print('warning : install pypy3 for faster solving time')
+    pypy3_installed = False
+
+
 def print_bar(i, count):
+    global print
     step = 1
     while count // step > 80:
         step += 1
@@ -16,31 +38,44 @@ def print_bar(i, count):
     j = i // step
     bar = '[{}{}] {}/{}'.format('#'*(j), '.'*(w - j), i, count)
     print(bar, end='\r')
-    return len(bar)
+
+    old_print = print
+    def new_print(x, *args, **kwargs):
+        global print
+        print = old_print 
+        print(x + ' '*(len(bar) - len(x)), *args, **kwargs)
+    print = new_print
+
+
+def get_cmd(fn):
+    ext = fn.split('.')[-1]
+    if ext == 'py':
+        with open(fn) as f:
+            shebang = f.read().lstrip().split('\n')[0]
+        if shebang[:2] != '#!':
+            cmd = 'python '
+
+        if pypy_installed:
+            return shebang[2:].replace('python', 'pypy') + ' ' 
+        if pypy3_installed:
+            return  shebang[2:].replace('python3', 'pypy3') + ' ' 
+    return './' 
+
+
 
 def run(fn, cmd=None):
-    if cmd == None:
-        ext = fn.split('.')[-1]
-        if ext == 'py':
-            with open(fn) as f:
-                shebang = f.read().lstrip().split('\n')[0]
-            if shebang[:2] != '#!':
-                cmd = 'pypy '
-            else:
-                cmd = shebang[2:].replace('python', 'pypy') + ' ' 
-        else:
-            cmd = './' 
+    cmd = get_cmd(fn) if cmd==None else cmd
 
     proc = subprocess.run(cmd + fn, shell=True,
                           stdout=subprocess.PIPE,
                           stderr=subprocess.PIPE)
     if len(proc.stderr) > 0:
         if 'pypy' in cmd:
-            print('warning : pypy failed. trying cpython', file=sys.stderr)
-            print(proc.stderr)
+            #print('warning : pypy failed. trying cpython', file=sys.stderr)
+            #print(proc.stderr)
             return run(fn, cmd = cmd.replace('pypy', 'python'))
         print('error : error while running solution')
-        print(proc.stderr)
+        print(proc.stderr.decode('utf-8'), end='')
 
     return proc.stdout.decode('utf-8').rstrip().split('\n')[-1]
     
@@ -53,14 +88,11 @@ def main():
     print('Num    Solution')
     print('---------------')
     for i, x in enumerate(solved, start=1):
-        bar_len = print_bar(i, len(fs))
+        print_bar(i, len(fs))
 
         f = fs[x]
         r = run(f)
-        fst_str = '{:>3d}    {}'.format(x, r)
-        print(fst_str, end='')
-        line = ' ' * (bar_len - len(fst_str))
-        print(line)
+        print('{:>3d}    {}'.format(x, r))
 
 if __name__ == '__main__':
     main()