Update readme and fix example

bindings/python/README.md

@@ -1,10 +1,20 @@
 ### Python Bindings
 
 ```
-python3.7 -m venv .env
+# This expect the rust chain to be nightly
+rustup update
+rustup default nightly
+
+# In this folder:
+python3 -m venv .env
 source .env/bin/activate
 pip install maturin
-maturin build
+maturin develop --release
 
+# Then test:
+pip install transformers
+
+python example.py --file <FILE_PATH>
+# or
 python example.py
 ```

bindings/python/example.py

@@ -17,27 +17,27 @@ if args.file is not None:
         text = [ line.strip() for line in fp ]
 else:
     text = """
-    The Zen of Python, by Tim Peters
-    Beautiful is better than ugly.
-    Explicit is better than implicit.
-    Simple is better than complex.
-    Complex is better than complicated.
-    Flat is better than nested.
-    Sparse is better than dense.
-    Readability counts.
-    Special cases aren't special enough to break the rules.
-    Although practicality beats purity.
-    Errors should never pass silently.
-    Unless explicitly silenced.
-    In the face of ambiguity, refuse the temptation to guess.
-    There should be one-- and preferably only one --obvious way to do it.
-    Although that way may not be obvious at first unless you're Dutch.
-    Now is better than never.
-    Although never is often better than *right* now.
-    If the implementation is hard to explain, it's a bad idea.
-    If the implementation is easy to explain, it may be a good idea.
-    Namespaces are one honking great idea -- let's do more of those!
-    """.split("\n")
+The Zen of Python, by Tim Peters
+Beautiful is better than ugly.
+Explicit is better than implicit.
+Simple is better than complex.
+Complex is better than complicated.
+Flat is better than nested.
+Sparse is better than dense.
+Readability counts.
+Special cases aren't special enough to break the rules.
+Although practicality beats purity.
+Errors should never pass silently.
+Unless explicitly silenced.
+In the face of ambiguity, refuse the temptation to guess.
+There should be one-- and preferably only one --obvious way to do it.
+Although that way may not be obvious at first unless you're Dutch.
+Now is better than never.
+Although never is often better than *right* now.
+If the implementation is hard to explain, it's a bad idea.
+If the implementation is easy to explain, it may be a good idea.
+Namespaces are one honking great idea -- let's do more of those!
+""".split("\n")
 
 
 tok_p = GPT2Tokenizer.from_pretrained('gpt2')