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currency_exchange.py
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#!/usr/bin/env python
"""
python currency_exchange.py --send EUR --req USD --send_amount 100
see Yahoo Finance, Google, Xe.com
"""
import os
#import locale
import argparse
import sets
import pandas as pd
import matplotlib.pyplot as plt
import networkx as nx
class CurrencyExchanche:
def __init__(self, args):
self.args = args
def update(self):
self.draw_digraph()
def load_market(self):
self.df_markets_btc = pd.read_csv(os.path.join(self.args.basepath, 'markets_btc.csv'), sep=';')
#self.df_markets_exchangers = pd.read_csv('markets_exchangers.csv', sep=';')
# raise TypeError('unhashable type')
self.df_markets = self.df_markets_btc
#self.df_markets = pd.concat([self.df_markets_btc, self.df_markets_exchangers])
# see https://www.aurumxchange.com/data/rates.json
print(self.df_markets)
self.df_markets['active'] = self.df_markets['active'].map(bool)
self.df_markets['fullmarketname'] = self.df_markets['market']+'|'+self.df_markets['cur1']+'/'+self.df_markets['cur2']
self.df_markets = self.df_markets[self.df_markets['active']==True] # only active market
#print(self.df_markets)
def draw_digraph(self):
print("Draw DiGraph")
self.load_market()
self.df_markets['cur1_account'] = self.df_markets['market']+'_'+self.df_markets['cur1']
self.df_markets['cur2_account'] = self.df_markets['market']+'_'+self.df_markets['cur2']
print(self.df_markets)
set_cur1 = sets.Set(self.df_markets['cur1'].unique())
set_cur2 = sets.Set(self.df_markets['cur2'].unique())
currencies = set_cur1.union(set_cur2)
print(currencies)
set_acc_cur1 = sets.Set(self.df_markets['cur1_account'].unique())
set_acc_cur2 = sets.Set(self.df_markets['cur2_account'].unique())
accounts = set_acc_cur1.union(set_acc_cur2)
#print(accounts)
G = nx.DiGraph()
G.add_nodes_from(currencies)
G.add_nodes_from(accounts)
for i in self.df_markets.index:
market = self.df_markets['market'][i]
cur1 = self.df_markets['cur1'][i]
cur2 = self.df_markets['cur2'][i]
cur1_account = self.df_markets['cur1_account'][i]
cur2_account = self.df_markets['cur2_account'][i]
active = self.df_markets['active'][i]
fullmarketname = self.df_markets['fullmarketname'][i]
#print("{fullmarketname}".format(fullmarketname=fullmarketname))
G.add_edge(cur1_account, cur2_account) # label=market #, label='0'
G.add_edge(cur2_account, cur1_account)
G.add_edge(cur1_account, cur1)
G.add_edge(cur1, cur1_account)
G.add_edge(cur2_account, cur2)
G.add_edge(cur2, cur2_account)
#nx.draw(G)
#nx.draw_random(G)
#nx.draw_circular(G)
#nx.draw_spectral(G)
#plt.savefig("path.png")
#plt.show()
nx.draw_graphviz(G)
nx.write_dot(G,'path.dot')
def draw_multigraph(self):
print("Draw MultiGraph")
self.load_market()
set_cur1 = sets.Set(self.df_markets['cur1'].unique())
set_cur2 = sets.Set(self.df_markets['cur2'].unique())
currencies = set_cur1.union(set_cur2)
#print(currencies)
G=nx.MultiGraph() # Graph (pas plusieurs aretes) MultiDiGraph (plusieurs aretes dirigees entre 2 noeuds)
G.add_nodes_from(currencies)
#
#egde_labels = list()
for i in self.df_markets.index:
market = self.df_markets['market'][i]
cur1 = self.df_markets['cur1'][i]
cur2 = self.df_markets['cur2'][i]
active = self.df_markets['active'][i]
fullmarketname = self.df_markets['fullmarketname'][i]
print("{fullmarketname}".format(fullmarketname=fullmarketname))
G.add_edge(cur1, cur2, label=market)
#egde_labels[(cur1, cur2)] = fullmarketname
#nx.draw_networkx_labels(G,1,fontsize=2, labelloc='c')
#nx.draw_networkx_edge_labels(G,1, egde_labels, label_pos=0.3, ax=None, rotate=False)
print(G)
#print(egde_labels)
#nx.draw(G)
#nx.draw_random(G)
#nx.draw_circular(G)
#nx.draw_spectral(G)
nx.draw_graphviz(G)
nx.write_dot(G, os.path.join(self.args.basepath, 'path.dot'))
#try:
# p = nx.shortest_path(G, source=args.send, target=args.requ, weight=None)
# print("Shortest path is {path}".format(path=p))
#except:
# raise(Exception("Can't find a path - valid nodes are {currencies}".format(currencies=currencies)))
#paths = nx.all_shortest_paths(G, source=args.send, target=args.requ)
#print(paths)
#plt.savefig("path.png")
#plt.show()
if __name__ == "__main__":
#locale.setlocale(locale.LC_ALL, 'en_US') # to print number with commas as thousands separators
#locale.setlocale(locale.LC_ALL, 'fr_FR') # to print number with commas as thousands separators
parser = argparse.ArgumentParser(description='Use the following parameters')
parser.add_argument('--nodownload', action="store_true", help="use this flag to avoid downloading orderbook (will use a previously downloaded file)")
parser.add_argument('--send', action="store", help="use this flag to set what currency was sent")
parser.add_argument('--requ', action="store", help="use this flag to set what currency is requested")
parser.add_argument('--send_amount', action="store", help="use this flag to set how much currency is send")
args = parser.parse_args()
args.basepath = os.path.dirname(__file__)
ce = CurrencyExchanche(args)
ce.update()