Merge pull request #42 from huangaszaq/master

add qrcode and dependences

requirements-dev.txt

@@ -5,5 +5,5 @@ pycodestyle
 pylint
 pylint-quotes
 pytest
-pytype
+pytype==2020.2.20
 semver

requirements.txt

@@ -1 +1,2 @@
 requests
+qrcode

src/wechaty/utils/qrcode_terminal.py

@@ -0,0 +1,42 @@
+import qrcode
+import platform
+
+
+def qr_terminal_str(data,version=None):
+    """
+
+    :param data: qrcode data
+    :param version:1-40 or None
+    :return:
+    """
+    if platform.system() == "Windows":
+        white_block = '▇'
+        black_block = '  '
+        new_line = '\n'
+    else:
+        white_block = '\033[0;37;47m  '
+        black_block = '\033[0;37;40m  '
+        new_line = '\033[0m\n'
+
+    qr = qrcode.QRCode(version)
+    qr.add_data(data)
+    if version:
+        qr.make()
+    else:
+        qr.make(fit=True)
+    output = white_block*(qr.modules_count+2) + new_line
+    for mn in qr.modules:
+        output += white_block
+        for m in mn:
+            if m:
+                output += black_block
+            else:
+                output += white_block
+        output += white_block + new_line
+    output += white_block*(qr.modules_count+2) + new_line
+    return output
+
+
+def draw(data, version=None):
+    output = qr_terminal_str(data,version)
+    print (output)