Pandas：基於兩個不同的列創建唯一值的索引
[英]Pandas: Creating an index of unique values based off of two different columns
問題描述
我正在為我正在創建航線的項目改進我的代碼。 我目前擁有的是由 c_match 的索引值組合在一起的數據幀。 酷，很棒，乍一看，一切看起來都是正確的。
航道是一組具有相同折扣和最低費用的狀態。 我的代碼返回具有相同折扣的州。 大多數具有相同折扣的州也有相同的最低費用。 然而，異常值是具有相同折扣和不同最低費用的狀態。
目標：創建具有相同最低費用和相同折扣百分比的運輸路線。
我的想法：創建一個邏輯操作，將具有相同費率和成本的州名稱連接起來，並返回它們的費率和成本。 仍然需要考慮對相同費率具有不同成本的國家。
期望輸出：
Shipping Lane Rate Cost
20_21_RDWY_Purple_AL_AR_KY_LA_MS_SC_TN_PE 50.80% 120
20_21_RDWY_Purple_AZ 50.80% 155
20_21_RDWY_Purple_CA 62.40% 145
20_21_RDWY_Purple_CO_ND_WY_MB_NF_PQ 62.40% 155
20_21_RDWY_Purple_CT_DE_MN_NE 50.00% 145
20_21_RDWY_Purple_DC_IA_KS_MD_MI_OH_OK_WI 49.00% 125
20_21_RDWY_Purple_FL 48.30% 125
當前代碼：
def remove_dups(input, output):
input.sort()
n_list = list(input for input, _ in itertools.groupby(input))
output.append(n_list)
def get_matches_discount(state):
state_groups = []
state_rates = []
state_cost = []
final_format = []
match = []
c_match = []
for i, x in enumerate(df_d[state]):
#checks within the column for identical values then maps where the identical values are
match1 = [j for j, y in enumerate(df_d[state].isin([x])) if y is True]
match.append(match1)
remove_dups(match, c_match)
for list in c_match:
for elements in list:
r = elements[0]
state_g = df_d.index[elements]
state_groups.append(state_g)
state_r = df_d[state][r]
state_rates.append(state_r)
print(state_rates)
match_cost = df_m[state][r]
state_cost.append(match_cost)
for i in state_groups:
delimiter = "_"
join_str = delimiter.join(i)
j_str = "20_21_RDWY_Purple_" + join_str
final_format.append(j_str)
master_frame = pd.DataFrame(
{'Shipping Lane': final_format,
'Rate': state_rates,
'Cost': state_cost,
}
)
print(master_frame)
return master_frame
m_col_names = ['AL', 'AR', 'AZ', 'CA', 'CO', 'CT', 'DC', 'DE', 'FL', 'GA', 'IA', 'ID', 'IL', 'IN', 'KS', 'KY', 'LA',
'MA', 'MD', 'ME', 'MI', 'MN', 'MO', 'MS', 'MT', 'NC', 'ND', 'NE', 'NH', 'NJ', 'NM', 'NV', 'NY', 'OH',
'OK', 'OR', 'PA', 'RI', 'SC', 'SD', 'TN', 'TX', 'UT', 'VA', 'VT', 'WA', 'WI', 'WV', 'WY', 'AB', 'BC',
'MB', 'NB', 'NF', 'NS', 'ON', 'PE', 'PQ', 'SK']
# calls the function in a loop to process one column at a time
# creates the master data frame outside of the function calling for loop
master_dataframe0 = pd.DataFrame()
for state in m_col_names:
temp_df = get_matches_discount(state)
# Stores the function call as a variable
master_dataframe0 = master_dataframe0.append(temp_df)
# Creates an appended dataframe outside of the function
print(master_dataframe0)
master_dataframe0.to_excel("shipping_lanes_revised00.xlsx")
樣本輸入：
最低收費表
這是數據框：df_m
State AL AR AZ CA CO CT DC
AL 120.00 120.00 155.00 145.00 155.00 145.00 125.00
AR 120.00 120.00 155.00 155.00 145.00 155.00 145.00
AZ 155.00 155.00 120.00 120.00 125.00 185.00 185.00
CA 145.00 164.30 120.00 120.00 170.00 185.00 185.00
CO 155.00 145.00 125.00 145.00 120.00 155.00 155.00
CT 145.00 155.00 185.00 185.00 155.00 120.00 120.00
DC 125.00 155.00 185.00 185.00 155.00 120.00 185.00
DE 145.00 155.00 185.00 185.00 155.00 120.00 120.00
FL 125.00 145.00 145.00 185.00 145.00 155.00 145.00
GA 120.00 120.00 155.00 145.00 155.00 145.00 120.00
IA 125.00 125.00 155.00 145.00 125.00 155.00 145.00
ID 145.00 155.00 145.00 145.00 125.00 185.00 185.00
IL 120.00 120.00 155.00 145.00 145.00 125.00 125.00
IN 120.00 120.00 155.00 145.00 145.00 125.00 120.00
KS 125.00 120.00 155.00 155.00 120.00 155.00 145.00
KY 120.00 120.00 155.00 145.00 145.00 125.00 125.00
LA 120.00 120.00 155.00 145.00 155.00 155.00 155.00
MA 155.00 155.00 185.00 185.00 145.00 120.00 120.00
MD 125.00 145.00 185.00 185.00 155.00 120.00 120.00
ME 155.00 155.00 185.00 185.00 145.00 120.00 125.00
MI 125.00 125.00 145.00 145.00 155.00 125.00 120.00
MN 145.00 125.00 155.00 145.00 145.00 155.00 145.00
MO 120.00 120.00 155.00 155.00 125.00 145.00 145.00
MS 120.00 120.00 155.00 155.00 145.00 155.00 145.00
MT 145.00 155.00 155.00 155.00 125.00 185.00 185.00
NC 120.00 125.00 145.00 185.00 155.00 125.00 120.00
ND 155.00 155.00 145.00 145.00 155.00 155.00 155.00
NE 145.00 125.00 155.00 155.00 120.00 155.00 155.00
NH 155.00 155.00 185.00 185.00 145.00 120.00 120.00
NJ 145.00 155.00 185.00 185.00 155.00 120.00 120.00
NM 155.00 125.00 120.00 145.00 120.00 145.00 145.00
NV 145.00 155.00 120.00 120.00 145.00 185.00 185.00
NY 145.00 145.00 185.00 185.00 155.00 120.00 120.00
OH 125.00 125.00 145.00 145.00 155.00 120.00 120.00
OK 125.00 120.00 145.00 155.00 120.00 155.00 155.00
OR 185.00 145.00 155.00 125.00 155.00 185.00 185.00
PA 145.00 145.00 185.00 185.00 155.00 120.00 120.00
RI 155.00 155.00 185.00 185.00 145.00 120.00 120.00
SC 120.00 120.00 145.00 185.00 155.00 125.00 120.00
SD 155.00 145.00 155.00 155.00 120.00 155.00 145.00
TN 120.00 120.00 155.00 145.00 155.00 145.00 125.00
TX 125.00 120.00 145.00 155.00 125.00 145.00 155.00
UT 170.00 164.30 132.50 132.50 127.20 145.00 145.00
VA 120.00 145.00 145.00 185.00 155.00 120.00 120.00
折扣表
這是數據幀：df_d
State AL AR AZ CA CO CT DC
AL 50.80% 44.10% 54.30% 73.10% 53.90% 50.00% 49.00%
AR 50.80% 50.80% 53.90% 65.70% 50.00% 53.90% 50.00%
AZ 56.70% 55.80% 50.80% 54.10% 49.60% 59.50% 64.40%
CA 62.40% 61.00% 54.30% 61.40% 43.00% 52.30% 54.30%
CO 54.30% 67.10% 49.00% 65.70% 50.80% 54.30% 54.30%
CT 50.00% 53.90% 64.40% 72.50% 54.30% 50.80% 50.80%
DC 49.00% 53.90% 64.40% 64.40% 54.30% 50.80% 64.40%
DE 50.00% 53.90% 64.40% 64.40% 54.30% 50.80% 50.80%
FL 48.30% 35.00% 55.50% 55.50% 55.10% 66.40% 62.30%
GA 67.90% 44.10% 71.00% 64.60% 56.00% 50.00% 44.10%
IA 49.00% 49.00% 54.30% 61.80% 49.00% 53.90% 50.00%
ID 61.80% 54.30% 50.00% 75.90% 49.00% 64.40% 64.40%
IL 44.10% 44.10% 54.30% 64.00% 50.00% 49.00% 49.00%
IN 44.10% 1.60% 11.70% 26.10% -0.70% 49.00% 44.10%
KS 49.00% 63.40% 61.00% 67.70% 72.50% 72.20% 50.00%
KY 50.80% 44.10% 54.30% 61.50% 50.00% 49.00% 49.00%
LA 50.80% 44.10% 54.30% 61.80% 53.90% 54.30% 53.90%
MA 63.50% 53.90% 67.70% 63.90% 53.00% 63.50% 44.10%
MD 49.00% 50.00% 64.40% 73.80% 54.30% 50.80% 50.80%
ME 53.90% 54.30% 64.40% 64.40% 61.80% 50.80% 49.00%
MI 49.00% 49.00% 61.80% 55.10% 53.90% 49.00% 44.10%
MN 50.00% 49.00% 54.30% 61.80% 50.00% 53.90% 50.00%
MO 44.10% 50.80% 53.90% 56.10% 49.00% 50.00% 50.00%
MS 50.80% 50.80% 54.30% 63.90% 50.00% 53.90% 50.00%
MT 61.80% 54.30% 53.90% 75.80% 49.00% 64.40% 64.40%
NC 44.10% 59.20% 53.50% 58.60% 57.90% 42.90% 69.60%
ND 54.30% 53.90% 61.80% 61.80% 54.30% 53.90% 53.90%
NE 50.00% 49.00% 54.30% 54.30% 44.10% 53.90% 53.90%
NH 53.90% 54.30% 64.40% 64.40% 61.80% 50.80% 44.10%
NJ 50.50% 51.50% 70.50% 66.20% 59.70% 67.10% 50.80%
NM 53.90% 49.00% 44.10% 68.20% 44.10% 61.80% 61.80%
NV 61.80% 54.30% 52.70% 73.50% 50.00% 64.40% 64.40%
NY 61.10% 69.00% 65.50% 68.90% 63.00% 68.40% 50.80%
OH 49.00% 49.00% 68.50% 71.50% 72.30% 60.70% 44.10%
OK 49.00% 50.80% 50.00% 54.30% 44.10% 54.30% 54.30%
OR 64.40% 61.80% 53.90% 64.00% 53.90% 64.40% 64.40%
PA 47.20% 57.00% 33.70% 51.90% 45.50% 50.80% 50.80%
RI 53.90% 54.30% 64.40% 64.40% 61.80% 50.80% 44.10%
SC 50.80% 44.10% 61.80% 58.70% 54.30% 49.00% 44.10%
SD 53.90% 50.00% 54.30% 54.30% 44.10% 54.30% 61.80%
TN 50.80% 50.80% 52.50% 62.60% 61.30% 53.30% 49.00%
TX 56.60% 46.00% 51.40% 58.30% 53.20% 63.10% 65.10%
UT 45.00% 60.60% 73.50% 73.50% 70.30% 44.40% 61.90%
VA 57.90% 50.00% 61.80% 72.10% 54.30% 44.10% 50.80%
電流輸出：
Shipping Lane Rate Cost
0 20_21_RDWY_Purple_AL_AR_KY_LA_MS_SC_TN_PE 50.80% 120.0
1 20_21_RDWY_Purple_AZ 56.70% 155.0
2 20_21_RDWY_Purple_CA 62.40% 145.0
3 20_21_RDWY_Purple_CO_ND_WY_MB_NF_PQ 54.30% 155.0
4 20_21_RDWY_Purple_CT_DE_MN_NE 50.00% 145.0
5 20_21_RDWY_Purple_DC_IA_KS_MD_MI_OH_OK_WI 49.00% 125.0
6 20_21_RDWY_Purple_FL 48.30% 125.0
7 20_21_RDWY_Purple_GA 67.90% 120.0
8 20_21_RDWY_Purple_ID_MT_NV_AB_SK 61.80% 145.0
9 20_21_RDWY_Purple_IL_IN_MO_NC_WV 44.10% 120.0
10 20_21_RDWY_Purple_MA 63.50% 155.0
11 20_21_RDWY_Purple_ME_NH_NM_RI_SD_VT_NB_NS 53.90% 155.0
12 20_21_RDWY_Purple_NJ 50.50% 145.0
13 20_21_RDWY_Purple_NY 61.10% 145.0
14 20_21_RDWY_Purple_OR_WA_BC 64.40% 185.0
15 20_21_RDWY_Purple_PA 47.20% 145.0
16 20_21_RDWY_Purple_TX 56.60% 125.0
17 20_21_RDWY_Purple_UT 45.00% 170.0
18 20_21_RDWY_Purple_VA 57.90% 120.0
19 20_21_RDWY_Purple_ON 37.30% 145.0
0 20_21_RDWY_Purple_AL_GA_IL_KY_LA_SC 44.10% 120.0
1 20_21_RDWY_Purple_AR_MO_MS_OK_TN_NB_NF_NS_PE 50.80% 120.0
2 20_21_RDWY_Purple_AZ 55.80% 155.0
3 20_21_RDWY_Purple_CA 61.00% 164.3
4 20_21_RDWY_Purple_CO 67.10% 145.0
5 20_21_RDWY_Purple_CT_DC_DE_MA_ND_MB 53.90% 155.0
6 20_21_RDWY_Purple_FL 35.00% 145.0
7 20_21_RDWY_Purple_IA_MI_MN_NE_NM_OH_WI_WV 49.00% 125.0
8 20_21_RDWY_Purple_ID_ME_MT_NH_NV_RI_VT_PQ_SK 54.30% 155.0
9 20_21_RDWY_Purple_IN 1.60% 120.0
10 20_21_RDWY_Purple_KS 63.40% 120.0
11 20_21_RDWY_Purple_MD_SD_VA_WY 50.00% 145.0
12 20_21_RDWY_Purple_NC 59.20% 125.0
13 20_21_RDWY_Purple_NJ 51.50% 155.0
14 20_21_RDWY_Purple_NY 69.00% 145.0
15 20_21_RDWY_Purple_OR_WA_AB 61.80% 145.0
16 20_21_RDWY_Purple_PA 57.00% 145.0
17 20_21_RDWY_Purple_TX 46.00% 120.0
18 20_21_RDWY_Purple_UT 60.60% 164.3
19 20_21_RDWY_Purple_BC 64.40% 185.0
20 20_21_RDWY_Purple_ON 32.10% 145.0
0 20_21_RDWY_Purple_AL_CA_IA_IL_KY_LA_MN_MS_NE_SD_WA_AB_BC 54.30% 155.0
1 20_21_RDWY_Purple_AR_MO_MT_OR 53.90% 155.0
2 20_21_RDWY_Purple_AZ_NB_NF_NS_PE 50.80% 120.0
3 20_21_RDWY_Purple_CO 49.00% 125.0
4 20_21_RDWY_Purple_CT_DC_DE_MD_ME_NH_RI_VT_ON_PQ_SK 64.40% 185.0
5 20_21_RDWY_Purple_FL 55.50% 145.0
6 20_21_RDWY_Purple_GA 71.00% 155.0
7 20_21_RDWY_Purple_ID_OK_WY 50.00% 145.0
8 20_21_RDWY_Purple_IN 11.70% 155.0
9 20_21_RDWY_Purple_KS 61.00% 155.0
10 20_21_RDWY_Purple_MA 67.70% 185.0
11 20_21_RDWY_Purple_MI_ND_SC_VA_WV_MB 61.80% 145.0
12 20_21_RDWY_Purple_NC 53.50% 145.0
13 20_21_RDWY_Purple_NJ 70.50% 185.0
14 20_21_RDWY_Purple_NM 44.10% 120.0
15 20_21_RDWY_Purple_NV 52.70% 120.0
16 20_21_RDWY_Purple_NY 65.50% 185.0
17 20_21_RDWY_Purple_OH 68.50% 145.0
18 20_21_RDWY_Purple_PA 33.70% 185.0
19 20_21_RDWY_Purple_TN 52.50% 155.0
20 20_21_RDWY_Purple_TX 51.40% 145.0
2 個解決方案
解決方案1
2 已采納 2020-09-25 20:39:40
您有多個狀態行，但它們也在列上。 看起來您只是在顯示AL列的示例輸出？ 您可以在State上合並兩個數據幀，然后在.groupby Rate和Cost上合並。 然后，返回具有相同速率和成本的狀態的連接字符串（使用.apply(lambda x: '_'.join(x)) ）（因為您按它們分組，它們將具有相同的速率和成本）：
master_dataframe0 = (pd.merge(df_d[['State', 'AL']], df_m[['State', 'AL']], how='inner', on='State')
.rename({'AL_x' : 'Rate', 'AL_y' : 'Cost'}, axis=1)
.groupby(['Rate', 'Cost'])['State'].apply(lambda x: '_'.join(x)).reset_index()
.sort_values('State'))
master_dataframe0 = master_dataframe0[['State', 'Rate', 'Cost']].assign(State='20_21_RDWY_Purple_' + master_dataframe0['State'])
master_dataframe0
Out[1]:
State Rate Cost
7 20_21_RDWY_Purple_AL_AR_KY_LA_MS_SC_TN 50.80% 120.0
11 20_21_RDWY_Purple_AZ 56.70% 155.0
15 20_21_RDWY_Purple_CA 62.40% 145.0
9 20_21_RDWY_Purple_CO_ND 54.30% 155.0
5 20_21_RDWY_Purple_CT_DE_MN_NE 50.00% 145.0
4 20_21_RDWY_Purple_DC_IA_KS_MD_MI_OH_OK 49.00% 125.0
3 20_21_RDWY_Purple_FL 48.30% 125.0
18 20_21_RDWY_Purple_GA 67.90% 120.0
14 20_21_RDWY_Purple_ID_MT_NV 61.80% 145.0
0 20_21_RDWY_Purple_IL_IN_MO_NC 44.10% 120.0
16 20_21_RDWY_Purple_MA 63.50% 155.0
8 20_21_RDWY_Purple_ME_NH_NM_RI_SD 53.90% 155.0
6 20_21_RDWY_Purple_NJ 50.50% 145.0
13 20_21_RDWY_Purple_NY 61.10% 145.0
17 20_21_RDWY_Purple_OR 64.40% 185.0
2 20_21_RDWY_Purple_PA 47.20% 145.0
10 20_21_RDWY_Purple_TX 56.60% 125.0
1 20_21_RDWY_Purple_UT 45.00% 170.0
12 20_21_RDWY_Purple_VA 57.90% 120.0
解決方案2
1 2020-09-28 22:40:20
使用 Erickson 對.groupby和 lambda 函數的幫助，我們得出了正確的解決方案：
pd.set_option('display.max_rows', None)
pd.set_option('display.max_columns', None)
pd.set_option('display.width', None)
pd.set_option('display.max_colwidth', None)
df_d = pd.read_excel(path,
sheet_name=0,
header=0,
index_col=False,
keep_default_na=True)
df_m = pd.read_excel(path2,
sheet_name=0,
header=0,
index_col=False,
keep_default_na=True)
m_col_names = ['AL', 'AR', 'AZ', 'CA', 'CO', 'CT', 'DC', 'DE', 'FL', 'GA', 'IA', 'ID', 'IL', 'IN', 'KS', 'KY', 'LA',
'MA', 'MD', 'ME', 'MI', 'MN', 'MO', 'MS', 'MT', 'NC', 'ND', 'NE', 'NH', 'NJ', 'NM', 'NV', 'NY', 'OH',
'OK', 'OR', 'PA', 'RI', 'SC', 'SD', 'TN', 'TX', 'UT', 'VA', 'VT', 'WA', 'WI', 'WV', 'WY', 'AB', 'BC',
'MB', 'NB', 'NF', 'NS', 'ON', 'PE', 'PQ', 'SK']
final_frame = pd.DataFrame()
for state in m_col_names:
master_dataframe0 = (pd.merge(df_d[['State', state]], df_m[['State', state]], how='inner', on='State')
.rename({state + '_x': 'Rate', state + '_y': 'Cost'}, axis=1)
.groupby(['Rate', 'Cost'])['State'].apply(lambda x: '_'.join(x)).reset_index()
.sort_values('State'))
master_dataframe0['Origin'] = state
master_dataframe0 = master_dataframe0[['State', 'Rate', 'Cost', 'Origin']].assign(
State='20_21_RDWY_Purple_' + master_dataframe0['State'])
final_frame = final_frame.append(master_dataframe0)
print(final_frame)
final_frame.to_excel("w3llshipmeright.xlsx")
正確的輸出：
根據不同行值的差異在 Pandas 中創建新列
[英]Creating new columns in Pandas based on difference of different row values
如何基於另一列的值（其中兩個不同的列中的值在pandas中相等）找到一列的行索引？
[英]How to find row index of one column based on values of a different column where the values in the two distinct columns are equal in pandas?
Python：使用基於嵌套列表中的唯一值的列創建pandas數據幀
[英]Python: Create pandas dataframe with columns based off of unique values in nestled list
Pandas：根據兩個不同列的映射更改列中的值
[英]Pandas : change values in column based on a mapping of two different columns
聲明:本站的技術帖子網頁，遵循CC BY-SA 4.0協議，如果您需要轉載，請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.