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Legal Studies在 Python 中將日期時間的陣列轉換為字串陣列，並傳遞小時日期時間單位
要將日期時間陣列轉換為字串陣列，在 Python Numpy 中使用 numpy.datetime_as_string() 方法。此方法返回一個與輸入陣列形狀相同的字串陣列。第一個引數是要格式化的 UTC 時間戳陣列。“單位”引數設定要改變精度的日期時間單位。我們已傳遞小時單位
步驟
首先，匯入所需的庫 −
import numpy as np
建立一個日期時間陣列。'M' 型別指定日期時間 −
arr = np.arange('2022-02-20T02:10', 6*60, 60, dtype='M8[m]')顯示我們的陣列 −
print("Array...\n",arr)獲取資料型別：−
print("\nArray datatype...\n",arr.dtype)
獲取陣列的維度 −
print("\nArray Dimensions...\n",arr.ndim)獲取陣列的形狀 −
print("\nOur Array Shape...\n",arr.shape)獲取陣列元素的數量 −
print("\nNumber of elements in the Array...\n",arr.size)要將日期時間陣列轉換為字串陣列，在 Python Numpy 中使用 numpy.datetime_as_string() 方法 −
print("\nResult...\n",np.datetime_as_string(arr, unit ='h'))
示例
import numpy as np
# Create an array of datetime
# The 'M' type specifies datetime
arr = np.arange('2022-02-20T02:10', 6*60, 60, dtype='M8[m]')
# Displaying our array
print("Array...\n",arr)
# Get the datatype
print("\nArray datatype...\n",arr.dtype)
# Get the dimensions of the Array
print("\nArray Dimensions...\n",arr.ndim)
# Get the shape of the Array
print("\nOur Array Shape...\n",arr.shape)
# Get the number of elements of the Array
print("\nNumber of elements in the Array...\n",arr.size)
# To convert an array of datetimes into an array of strings, use the numpy.datetime_as_string() method in Python Numpy
# The method returns an array of strings the same shape as the input array
# The first parameter is the array of UTC timestamps to format
# The "units" parameter sets the datetime unit to change the precision
# We have passed the hours unit
print("\nResult...\n",np.datetime_as_string(arr, unit ='h'))輸出
Array... ['2022-02-20T02:10' '2022-02-20T03:10' '2022-02-20T04:10' '2022-02-20T05:10' '2022-02-20T06:10' '2022-02-20T07:10'] Array datatype... datetime64[m] Array Dimensions... 1 Our Array Shape... (6,) Number of elements in the Array... 6 Result... ['2022-02-20T02' '2022-02-20T03' '2022-02-20T04' '2022-02-20T05' '2022-02-20T06' '2022-02-20T07']
更新於： 28-Feb-2022
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