add print all dex function, add more example

README.md

@@ -48,6 +48,8 @@ Now we support dex:
   - [1] [CherrySwap](https://www.cherryswap.net/)
 - polygon:
   - [1] [QuickSwap](https://quickswap.exchange/)
+- optimism:
+  - [1] [Uniswap V3](https://app.uniswap.org/#/swap)
 
 ---
 
@@ -106,6 +108,14 @@ bsc = ma.chain(name="bsc")
 bsc = ma.chain(chain_id=56)
 print(bsc)
 
+# use ['key'] or dot key name to access chain info
+print(bsc['chain_id'])
+# 56
+print(bsc.name)
+# Binance Smart Chain Mainnet
+print(bsc.dex.pancake_v2.router_address)
+# 0x10ED43C718714eb63d5aA57B78B54704E256024E
+
 # to get some items from chain
 eth_weth = ma.get('eth', 'weth')
 print(eth_weth)

examples/example1.py

@@ -34,6 +34,14 @@
 bsc = ma.chain(chain_id=56)
 print(bsc)
 
+# use ['key'] or dot key name to access chain info
+print(bsc['chain_id'])
+# 56
+print(bsc.name)
+# Binance Smart Chain Mainnet
+print(bsc.dex.pancake_v2.router_address)
+# 0x10ED43C718714eb63d5aA57B78B54704E256024E
+
 # to get some items from chain
 eth_weth = ma.get('eth', 'weth')
 print(eth_weth)

many_abis/utils.py

@@ -26,3 +26,11 @@ def load_all_abis():
 def load_chains():
     fp = os.path.join(root_path, "utils", "chains.json")
     return _load_json_file(fp)
+
+
+def print_all_dex():
+    from .chains import CHAINS
+    for name, chain in CHAINS.items():
+        print(f"- {name}:")
+        for j, (d_name, dex) in enumerate(chain.dex.items()):
+            print(f"  - [{j + 1}] [{dex.name}]({dex.website})")