Python: Datetime dates plotted repeatedly

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I have three datetime.date() objects and three points and the first and second date appear four times as x-ticks. Why? How can I prevent that?

import datetime
import matplotlib.pyplot as plt
import matplotlib.dates as mdates

dates = [datetime.date(2022, 3, 17), datetime.date(2022, 3, 18), datetime.date(2022, 3, 19)]
b = (0,1,2)

plt.errorbar(dates, b, fmt = '.')

myFmt = mdates.DateFormatter('%d-%m-%y')    
plt.gca().xaxis.set_major_formatter(myFmt)
plt.xticks(rotation=30)

plt.show()
datetime python
1 Answers
import datetime
import matplotlib.pyplot as plt
import matplotlib.dates as mdates

dates = [datetime.date(2022, 3, 17), datetime.date(2022, 3, 18), datetime.date(2022, 3, 19)]
b = (0,1,2)

plt.errorbar(dates, b, fmt = '.')

myFmt = mdates.DateFormatter('%d-%m-%y')
plt.gca().xaxis.set_major_formatter(myFmt)
plt.xticks(ticks=dates )

plt.show()
user_119850880
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