# 检查排序方法
df_1 = obj.df_投料[['倒卷前卷号']].reset_index(names='排序前序号')
df_1['长度'] = ser_1.map(len)
df_1.sort_values(by=['长度', '倒卷前卷号']).排序前序号.is_monotonic_increasing # pandas判断某列是否已按从小到大排序
# 检查排序方法
df_1 = obj.df_投料[['倒卷前卷号']].reset_index(names='排序前序号')
df_1['长度'] = ser_1.map(len)
df_1.sort_values(by=['长度', '倒卷前卷号']).排序前序号.is_monotonic_increasing # pandas判断某列是否已按从小到大排序
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