条形图上的错误（Python，Matplotlib）

Question

code for ploting bar chart:

import pylab as pl


data = """35389 6
35316 7
33921 8
1914 5
21 4
3 3
3 2
"""

values = []
dates = []

for line in data.split("\n"):
    x, y = line.split()
    values.append(int(x))
    dates.append(int(y))

fig = pl.figure()
ax = pl.subplot(111)
ax.bar(dates, values, width=100)
ax.xaxis_date()

Give this error :

File "try2.py", line 17, in x, y = line.split() ValueError: need more than 0 values to unpack

How to fix it?

Answer 1

I have slightly re-written some of your original code namely the string as the putting """ at the bottom like you have it will cause a redundant new element to be added to the list since you are splitting upon a new line

You have created the plot, but you still have not shown the plot I have fixed this by adding two additional lines to the bottom of your code. However, even with this you are going to have one or two more errors and I will leave these to you to figure out the resolution.

import pylab as pl

data = """35389 6
35316 7
33921 8 
1914 5
21 4
3 3
3 2"""

values = []
dates = []

for element in data.split("\n"):
    x, y= element.split()
    values.append(int(x))
    dates.append(int(y))

fig = pl.figure()
ax = pl.subplot(111)
ax.bar(dates, values, width=100)
ax.xaxis_date()
fig.show()
pl.show()