added files

common.py

@@ -0,0 +1,46 @@
+"""
+Common code for reuse in notebooks
+"""
+
+
+def systemInfo():
+    """ print versions of most important modules """
+    import imp
+
+    modules = ['tradingWithPython','pandas','ibapi','ib']
+
+
+    for name in modules:
+        print(5*'-',name,5*'-')
+        try:
+            result = imp.find_module(name)
+        except ImportError as e:
+            print(e)
+            continue
+
+        pkg = imp.load_module(name,*result)
+        print('Version: ',pkg.__version__)
+        print('Location:', pkg.__file__)
+
+def prettifyNotebook(figsize=[8,6], max_rows=10, precision=2):
+    """
+    cosmetic tweaks to make notebook look pretty
+    """
+    import matplotlib.pyplot as plt
+    plt.style.use('ggplot')
+
+    # bigger fitures
+    import matplotlib
+    matplotlib.rcParams['figure.figsize'] = figsize
+
+    # limint number of rows shown by pandas
+    import pandas as pd
+    pd.options.display.max_rows = max_rows
+
+    # set two-digit precision, we usually don't need more for financial data
+    pd.options.display.precision = precision
+
+
+if __name__=="__main__":
+    #systemInfo()
+    prettifyNotebook()