在非windows系统u'\u2588'只占一个英文字符宽度，导致命令行二维码显示错位

.gitignore

@@ -5,3 +5,4 @@ itchat.egg-info/*
 *.swp
 test.py
 itchat.pkl
+QR.jpg

itchat/client.py

@@ -91,7 +91,7 @@ def get_QR(self, uuid = None, enableCmdQR = False):
             QR_DIR = 'QR.jpg'
             with open(QR_DIR, 'wb') as f: f.write(r.content)
             if enableCmdQR:
-                tools.print_cmd_qr(QR_DIR)
+                tools.print_cmd_qr(QR_DIR, enableCmdQR = enableCmdQR)
             else:
                 tools.print_qr(QR_DIR)
             return True

itchat/tools.py

@@ -54,10 +54,17 @@ def print_qr(fileDir):
 try:
     from PIL import Image 
     def print_cmd_qr(fileDir, size = 37, padding = 3,
-            white = BLOCK, black = '  '):
+            white = BLOCK, black = '  ', enableCmdQR = True):
         img     = Image.open(fileDir)
         times   = img.size[0] / (size + padding * 2)
         rgb     = img.convert('RGB')
+        try:
+            blockCount = int(enableCmdQR)
+            assert(0 < blockCount)
+        except:
+            blockCount = 1
+        finally:
+            white *= blockCount
         sys.stdout.write(' '*50 + '\r')
         sys.stdout.flush()
         qr = white * (size + 2) + '\n'