ãã®ãšã©ãŒããããã°ããŠ
以äžã®ãšã©ãŒãPythonã¢ããªã±ãŒã·ã§ã³ã§çºçããŠããŸããåå ãç¹å®ããŠä¿®æ£ããŠãã ããã
Traceback (most recent call last):
File "app.py", line 23, in get_user_orders
total = sum(order["price"] * order["quantity"] for order in orders)
TypeError: unsupportâŠ
Fugu Ultra v2
## åå
`order["price"]` ã **æ°å€ã§ã¯ãªãæåå (`str`)** ã§è¿ã£ãŠããŠããããšãåå ã§ãã
Python ã§ã¯ `"1200" * 3` ã¯æãç®ã§ã¯ãªããæååã3åç¹°ãè¿ãããšããæå³ã«ãªããŸããä»å㯠`quantity` ã `int` ãªã®ã§äžèŠæç«ãããã§ããããšã©ãŒã¡ãã»ãŒãžã瀺ãéã `str * int` ã®çµã¿åããã§åãåã¿åãã `TypeError` ã«ãªã£ãŠããŸãã
æååã«ãªãå
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1. **ã«ã©ã åãæåå** â `price` ã `VARCHAR`/`TEXT` ã§å®çŸ©ãããŠããïŒ`"1,200"` ã `"$12.00"` ã®ãããªå€ãæ··ãã£ãŠããã±ãŒã¹ãïŒ
2. **DBãã©ã€ãã®å倿** â MySQL ã® `DECIMAL` ãæååã§è¿ãèšå®ïŒ`raw=True` ãªã©ïŒãSQLite ã«æååã®ãŸãŸ INSERT ãããŠãã
3. **ã¢ããªå±€ã§æååå** â ãã©ãŒã /JSON ã®å
¥åã倿ããã«ãã®ãŸãŸ INSERT ããŠãã
ãŸãå®éã®åã確èªãããšåãåããã§ããŸãã
```python
rows = db.query("SELECT price, quantity FROM orders WHERE user_id = %s", user_id)
for r in rows[:5]:
print(repr(r["price"]), type(r["price"]), repr(r["quantity"]), type(r["quantiâŠ
å¿çæé 97.1ç§åºå 6218 ããŒã¯ã³
Pareto
`price` ãŸã㯠`quantity` ãæååãšããŠååŸãããŠããå¯èœæ§ããããŸãããã ãã**æç€ºããããšã©ãŒã¡ãã»ãŒãžãšã³ãŒãã«ã¯äžæŽåããããŸã**ã
Pythonã§ã¯ã`str * int` ã¯ãšã©ãŒã§ã¯ãªãæååã®ç¹°ãè¿ãã«ãªããŸãã
```python
"100" * 2 # "100100"
```
ãã®çµæã `sum()` ã«æž¡ããšãéåžžã¯ä¹ç®ã§ã¯ãªãå ç®ã§æ¬¡ã®ãšã©ãŒã«ãªããŸãã
```text
TypeError: unsupported operand type(s) for +: 'int' and 'str'
```
ãã®ãããå®éã®å€ã»åãšãå®è¡ããŠããã³ãŒãããã³ãã¬ãŒã¹ããã¯ãäžèŽããŠãããã確èªããŠãã ããã
### 1. ååŸããå€ã®åã確èªãã
éçºç°å¢ã§ãéèšåã«æ¬¡ã確èªããŸãã
```python
for order in orders:
print(
repr(order["price"]), type(order["price"]),
repr(order["quantity"]), type(order["quantity"]),
)
```
### 2. æ°å€ã«å€æããŠããèšç®ãã
éé¡ã«ã¯ãæµ®åå°æ°ç¹ã«ããäžžã誀差ãé¿ããããã« `Decimal` ã䜿ããšããã§ãããã以äžã¯ã`price` ãæ°å€ãŸãã¯æ°å€æååã`quantity` ãæŽæ°ãŸãã¯æŽæ°æååã§ããããšãåæã«ããä¿®æ£äŸã§ãã
```python
from decimal impâŠ
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以äžã®TypeScript颿°ãã¬ãã¥ãŒããŠãå¯èªæ§ã»ããã©ãŒãã³ã¹ã»ãã¹ããã©ã¯ãã£ã¹ã®èгç¹ããæ¹åç¹ãææ¡ããŠãã ããã
async function fetchAllUsers(page: number = 1): Promise<any[]> {
let allUsers: any[] = [];
let hasMore = true;
let currentPage = page;
while (hasMoâŠ
Fugu Ultra v2
# ã³ãŒãã¬ãã¥ãŒ: `fetchAllUsers`
ããžãã¯ã®æå³ã¯æç¢ºã§ã`async/await` ã«ããçŽ çŽãªå®è£
ã«ãªã£ãŠããŸããç¹ã« **çµäºå€å®ã«ãã£ã«ã¿åŸã§ã¯ãªã API ãè¿ããçã® `data.users.length` ã䜿ã£ãŠããç¹ã¯æ£ãã**ïŒãã£ã«ã¿åŸã®ä»¶æ°ã§å€å®ãããšãå逿žã¿ãŠãŒã¶ãŒãå€ãããŒãžã§æ©æçµäºãããã°ã«ãªããŸãïŒããŸã `push` ãã«ãŒãã§åããŠããããã`push(...array)` ã«ããã¹ã¿ãã¯ãªãŒããŒãããŒãåé¿ã§ããŠããŸãã
äžæ¹ã§ã**åå®å
šæ§ã»HTTP ãšã©ãŒåŠçã»ããŒãžããŒã·ã§ã³ã®å
ç¢æ§**ã«éèŠãªæ¹åäœå°ããããŸãã以äžãéèŠåºŠé ã«ãŸãšããŸãã
---
## ææäºé
ãµããª
| # | éèŠåºŠ | åé¡ | å
容 |
|---|---|---|---|
| 1 | ðŽ é« | ãã° | `response.ok` ã確èªããŠããªãïŒ4xx/5xx ãæ£åžžç³»ãšããŠåŠçïŒ |
| 2 | ðŽ é« | ãã° | ç¡éã«ãŒãã®ãªã¹ã¯ïŒçµäºæ¡ä»¶ã API ã®æåã«å
šäŸåïŒ |
| 3 | ðŽ é« | åå®å
š | `any[]` ãåŒã³åºãåŽå
šäœã«äŒæ |
| 4 | ð äž | å
ç¢æ§ | ã¬ã¹ãã³ã¹åœ¢ç¶ã®ã©ã³ã¿ã€ã æ€èšŒããªã |
| 5 | ð äž | å
ç¢æ§ | ãã£ã³ã»ã«ïŒ`AbortSignal`ïŒéå¯Ÿå¿ |
| 6 | ð äž | ä¿å®æ§ | ããžãã¯ãã³ã㌠`100` ã®éè€å®çŸ© |
| 7 | ð äž | ä¿å®æ§ | ããžãã¯æåå `"deleted"` |
| 8 | ð äžâŠ
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Pareto
以äžã®èгç¹ã§æ¹åã§ããŸãã
## äž»ãªæ¹åãã€ã³ã
### 1. åå®å
šæ§
- `any[]` ã¯åãã§ãã¯ãå¹ããªããããAPI ã¬ã¹ãã³ã¹çšãšå€æåŸçšã®åãå®çŸ©ããã
- `status` ã¯å¯èœãªããªãã©ã«åã® union ã«ããã
- `response.json()` ã¯å®è¡æã«ã¯äœã§ãè¿ãåŸãã®ã§ãå¿
èŠãªã zod ãªã©ã§ããªããŒã·ã§ã³ããã
### 2. å¯èªæ§
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### 3. ããã©ãŒãã³ã¹
- ããŒãžããšã«çŽå `await` ããŠãããããããŒãžæ°ãå€ããšé
ããAPI ã `totalPages` ã `nextCursor` ãè¿ããªããåæå®è¡æ°ãå¶éãã€ã€äžŠåååŸãæ€èšããã
- å
šä»¶ãé
åã«ä¿æãããšå€§éããŒã¿ã§ã¡ã¢ãªãå§è¿«ãããå¿
èŠãªã `AsyncGenerator` ã§ã¹ããªãŒã åŠçããã
- ããŒãžãµã€ãºã 100 çšåºŠãªãã`filter` + `map` ã® 2 ãã¹ã§ãå®å®³ã¯å°ãªãã
### 4. ãã¹ããã©ã¯ãã£ã¹
- `response.ok` ã確èªããã
- `limit=100` ãªã©ã®ããžãã¯ãã³ããŒã¯å®æ°åããã
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---
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