python读取excel中的数据

import numpy as np
import matplotlib.pyplot as plt
import pandas as pd
#df = pd.read_excel('/Users/NaCl/Documents/first.xls')
#df  = pd.read_excel("Users/NaCl/Documents/first.xlsx")

import pandas as pd
import numpy as np
df = pd.read_excel('/Users/NaCl/Documents/first.xlsx')
print df
pand