Update README.md

README.md

@@ -1,2 +1,33 @@
-# pyqiwi
+# Pyqiwi
 Lib for QIWI payment system
+
+
+Installation
+------------
+
+    pip install pyqiwi
+
+
+Usage
+------------
+
+```python
+from decimal import Decimal
+from datetime import datetime, timedelta
+
+from pyqiwi import Qiwi
+
+
+qiwi = Qiwi('<shop_id>', '<app_id>', '<app_password>', '<notifications_password>')
+
+qiwi.create_invoice(
+    invoice_id='101',  # Must be unique for your shop
+    amount=Decimal('22.00'),
+    currency='RUB',
+    comment='Order #101', 
+    user='tel:+79998887766',
+    lifetime=datetime.now()+timedelta(hours=1),  # Must be in Europe/Moscow timezone
+)
+
+print 'Invoice info:', qiwi.create_invoice('101')
+print 'To pay invoice go to:', qiwi.get_invoice_url('101')