As requested in issue #1111

A python script to return

 - all exchanges supported by CCXT
 - all markets on a exchange

 Invoked as `python get_market_pairs.py` it will list exchanges
 Invoked as `python get_market_pairs binance` it will list all markets on binance

scripts/get_market_pairs.py

@@ -0,0 +1,93 @@
+import os
+import sys
+
+root = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
+sys.path.append(root + '/python')
+
+import ccxt  # noqa: E402
+
+
+def style(s, style):
+    return style + s + '\033[0m'
+
+
+def green(s):
+    return style(s, '\033[92m')
+
+
+def blue(s):
+    return style(s, '\033[94m')
+
+
+def yellow(s):
+    return style(s, '\033[93m')
+
+
+def red(s):
+    return style(s, '\033[91m')
+
+
+def pink(s):
+    return style(s, '\033[95m')
+
+
+def bold(s):
+    return style(s, '\033[1m')
+
+
+def underline(s):
+    return style(s, '\033[4m')
+
+
+def dump(*args):
+    print(' '.join([str(arg) for arg in args]))
+
+
+def print_supported_exchanges():
+    dump('Supported exchanges:', green(', '.join(ccxt.exchanges)))
+
+
+try:
+
+    id = sys.argv[1]  # get exchange id from command line arguments
+
+
+    # check if the exchange is supported by ccxt
+    exchange_found = id in ccxt.exchanges
+
+    if exchange_found:
+        dump('Instantiating', green(id), 'exchange')
+
+        # instantiate the exchange by id
+        exchange = getattr(ccxt, id)({
+            # 'proxy':'https://cors-anywhere.herokuapp.com/',
+        })
+
+        # load all markets from the exchange
+        markets = exchange.load_markets()
+
+        # output a list of all market symbols
+        dump(green(id), 'has', len(exchange.symbols), 'symbols:', exchange.symbols)
+
+        tuples = list(ccxt.Exchange.keysort(markets).items())
+
+        # debug
+        for (k, v) in tuples:
+            print(v)
+
+        # output a table of all markets
+        dump(pink('{:<15} {:<15} {:<15} {:<15}'.format('id', 'symbol', 'base', 'quote')))
+
+        for (k, v) in tuples:
+            dump('{:<15} {:<15} {:<15} {:<15}'.format(v['id'], v['symbol'], v['base'], v['quote']))
+
+    else:
+
+        dump('Exchange ' + red(id) + ' not found')
+        print_supported_exchanges()
+
+except Exception as e:
+    dump('[' + type(e).__name__ + ']', str(e))
+    dump("Usage: python " + sys.argv[0], green('id'))
+    print_supported_exchanges()
+