fix python tag in 10_xray.md

src/10_xray.md

@@ -12,23 +12,24 @@ jupyter:
     name: python3
 ---
 
-```{python initialize=true}
-import matplotlib.pyplot as plt
-
+```python tags=["initialize"]
 import numpy as np
+
 from math import pi
-from math import sqrt
+from math import sqrt 
+
+import matplotlib.pyplot as plt
 import matplotlib.pyplot as plt
 import matplotlib.patches as patches
 import matplotlib.transforms as mtransforms
 import matplotlib.image as img 
 
-from common import draw_classic_axes, configure_plotting
-
 import plotly.offline as py
 from plotly.subplots import make_subplots
 import plotly.graph_objs as go
 
+from common import draw_classic_axes, configure_plotting
+
 configure_plotting()
 
 py.init_notebook_mode(connected=True)